The Caretta Caretta Sea Turtle Guide: Zakynthos’ Living Legacy

The loggerhead sea turtle (Caretta caretta) is the soul of Zakynthos. These ancient mariners have nested on the island’s southern beaches for millennia — long before the first Venetian ship sailed into Laganas Bay. Today, Zakynthos hosts the largest nesting concentration of loggerheads in the entire Mediterranean, protected by one of Greece’s most important marine conservation areas.

This guide tells you everything you need to know about observing, respecting, and helping protect these extraordinary animals.

Meet the Loggerhead: Caretta caretta

The loggerhead sea turtle is the largest hard-shelled turtle in the world. Adults weigh between 80-180 kilograms (175-400 pounds) and reach shell lengths of 70-95 centimetres. They’re named for their disproportionately large head, which houses the powerful jaw muscles needed to crush hard-shelled prey like molluscs and crustaceans.

These are ancient animals — the species has remained essentially unchanged for 110 million years. They reach sexual maturity at 20-30 years and can live to 70 or 80 years in the wild. A female loggerhead will return to nest on the exact beach where she herself hatched decades earlier, navigating by the Earth’s magnetic field across thousands of kilometres of open ocean. This phenomenon, called natal homing, is one of nature’s most extraordinary navigational feats.

In Greek waters, an estimated 3,000-5,000 loggerheads remain. This number represents a significant recovery from the critically low populations of the 1980s and 1990s — before conservation efforts in Zakynthos began in earnest. The species is classified as Vulnerable on the IUCN Red List, which means every nest, every hatchling, every adult matters.

The Nesting Season: Understanding the Cycle

May-June: Arrival and Nesting

Female turtles begin arriving in the waters of Laganas Bay in May. By early June, nesting is in full swing. Nesting occurs almost exclusively at night, typically between midnight and 3:00 AM. A female drags herself up the beach above the high tide line, excavates a nest chamber with her rear flippers, deposits 80-120 eggs (roughly ping-pong ball size), covers the nest with sand using her flippers, and returns to the sea. The entire process takes 45-90 minutes.

A single female may nest 3-4 times in a season, with 10-14 days between nesting events. She does not nest every year — typically every 2-3 years.

July: Peak Nesting

July is the busiest month on the nesting beaches. Multiple females may nest on the same beach in a single night. This is when you’re most likely to see nesting tracks in the sand at dawn.

August-September: Hatching Season

After 45-60 days of incubation (temperature-dependent — warmer sand means faster development), the hatchlings emerge, typically at night. A nest contains roughly 100 eggs; perhaps 70-80 viable hatchlings will emerge. They navigate to the sea by orienting toward the brightest horizon — which in nature is the reflection of stars and moonlight on the water. Artificial light from beachfront buildings disorients them fatally.

The sprint from nest to sea is frantic and perilous. Predators — ghost crabs, gulls, fish — take many. Only roughly 1 in 1,000 hatchlings will survive to adulthood. The mathematics of sea turtle survival is brutal and why every protected nest matters enormously.

October: Season End

By early October, the last hatchlings have emerged. Adult turtles migrate to foraging grounds across the Mediterranean. The beaches return to their quiet state until next May.

The Five Nesting Beaches

Five main beaches in the Laganas Bay area fall within the National Marine Park of Zakynthos (NMPZ), established in 1999. Each has different access rules and conservation status.

Sekania — The Sanctuary Beach

Status: Completely closed to all visitors. No access by land or sea.
Nesting density: The highest in the Mediterranean — 700-1,000+ nests per season.

Sekania is the jewel of the NMPZ. This pristine beach records the highest nesting density of loggerhead turtles anywhere in the Mediterranean. It is permanently closed to protect this critical nesting habitat. Do not attempt to approach Sekania by boat — boat access within 200 metres is prohibited and enforced.

Gerakas — The Visitor’s Choice

Status: Open during daylight hours. Closes at sunset during nesting season.
Nesting density: High — one of the most productive open-access beaches.

Gerakas Beach is the nesting beach most visitors can experience. Located at the southeastern tip of the island, the beach is a wide arc of golden sand protected from waves by the headland. The water is shallow and calm — perfect for families with young children.

Visitor facilities: ARCHELON information kiosk, volunteer rangers on duty during season, clear signage about nesting areas. Certain sections of the beach are roped off when nests are detected — these areas are strictly off-limits.

Best time to visit: Early morning (before 9:00 AM) for the best chance of seeing fresh nesting tracks. The beach fills up quickly by midday in July and August.

Dafni — Between the Resorts

Status: Open during daylight hours. Closes at sunset during nesting season.
Nesting density: Moderate to high.

Dafni Beach lies between Kalamaki and Gerakas, accessible by road through the olive groves. It’s less developed than Gerakas and has a more isolated feel. The beach is narrower, but nesting numbers are significant each year.

Access note: The road to Dafni is unpaved and can be rough after rain. A standard rental car manages it, but take it slowly.

Kalamaki — The Town Beach

Status: Open with strict enforcement of nesting rules.
Nesting density: Moderate.

Kalamaki Beach sits directly behind the main tourist strip. The fact that turtles still nest here, in one of the most heavily visited areas of the island, is remarkable evidence of effective conservation. Volunteer rangers patrol daily during nesting season, enforcing protection measures.

What to expect: Sections of the beach are roped off when nests are identified. Sun loungers and umbrellas must be removed by sunset. No flash photography at night. The rules are strict, but the beach remains fully usable by visitors.

Marathonisi — Turtle Island

Status: Accessible only by boat. Landing restricted to designated areas.
Nesting density: Moderate.

Marathonisi is a small island in the middle of Laganas Bay, shaped like a turtle’s shell when viewed from above. The southern beach is an active nesting site. Boat tours from Laganas and Agios Sostis visit the island, but landing is only permitted in designated areas. The northern cove, with its small cave, is the swimming area for visitors.

The National Marine Park of Zakynthos (NMPZ)

Created in 1999 after years of conflict between tourism development interests and conservation science, the NMPZ covers 89 square kilometres of sea and 3.5 square kilometres of land. It divides the bay into zones with different restriction levels.

Essential Rules for All Visitors

These rules apply across all nesting beaches and are enforced by park rangers and volunteer patrols:

Beach Access:

• No access to nesting beaches after sunset during nesting season (June-August)
• No access to Sekania Beach at any time
• No access to roped-off nest protection areas

Light Restrictions:

• No artificial lights or fires on the beach at night
• Beachfront accommodations must use blackout curtains or turtle-friendly lighting
• No flash photography near nesting areas or after dark
• Mobile phone flashlights must be pointed at the ground

Noise and Behaviour:

• No loud noise near the waterline at dawn and dusk
• Keep distance from turtles in the water (minimum 20 metres)
• Do not touch, feed, or harass turtles
• Do not disturb nests or nesting females

Boating Restrictions:

• No vessels within 200 metres of designated nesting beaches
• Speed limit of 6 knots within the marine park
• No anchoring on seagrass beds (posidonia meadows)

Violations are reportable to the park authority and carry fines. Serious violations can result in prosecution. But the real enforcement is social — most visitors respect the rules because they understand what’s at stake.

ARCHELON: The Sea Turtle Protection Society of Greece

ARCHELON (The Sea Turtle Protection Society of Greece) has monitored Zakynthos’ turtle population since the 1980s. Their work is what makes the balance between tourism and conservation possible. They run volunteer programmes, nest monitoring, hatchling protection, and public education across the nesting beaches.

What ARCHELON Does

Morning Surveys: Volunteers patrol the beaches at dawn to identify and protect new nests. Fresh tracks are recorded, nests located, and protective cages installed where needed.

Night Patrols: During nesting season, volunteers monitor beaches to protect nesting females from disturbance. They also collect data on nesting behaviour.

Hatchling Protection: When hatching begins, volunteers monitor nests to ensure hatchlings make it safely to the sea. They intervene if hatchlings become disoriented by artificial light.

Public Education: The information kiosks at Gerakas and Dafni are staffed by volunteers who explain the work to visitors, answer questions, and promote responsible behaviour.

How to Get Involved

Volunteer Programme: ARCHELON accepts volunteers for 1-6 week commitments during the nesting season (June-September). Volunteers participate in morning and night patrols, data collection, and public education. No prior experience is needed — training is provided. This is a genuinely meaningful way to contribute to conservation.

Donations: ARCHELON is a non-profit organisation funded by donations. Every contribution goes directly to turtle protection work. You can donate via their website or at the information kiosks.

Dawn Beach Walks: Contact ARCHELON’s Zakynthos station to join a morning beach monitoring walk at Gerakas. This is free, educational, and gives you a behind-the-scenes look at conservation work.

🔗 ARCHELON & Conservation Links

• ARCHELON Website — Volunteering, donations, info
• ARCHELON Donate — Support directly
• NMPZ Contact — Emergency for injured turtles: +30 26950 29200

Boat Tours: Seeing Turtles at Sea

The bay of Laganas supports a resident population of loggerhead turtles feeding in the shallow waters. During the day, turtles surface regularly to breathe and can be observed from boats. This is the most reliable way for visitors to see turtles in the wild.

Licensed Boat Tours

Several licensed operators run turtle-watching boat tours from Laganas and Agios Sostis pier. These tours are regulated by the NMPZ and must follow specific guidelines to avoid disturbing the turtles.

What to expect:

• Duration: 45-90 minutes
• Cost: €10-20 per adult, €5-10 per child
• Boats: Glass-bottom boats (great for underwater views) and small tour boats
• Sighting rate: High in July-August (70-80% chance), lower in June and September

Best time for tours:

• Early morning (9:00-11:00 AM) — turtles are more active, the sea is calmer, and tours are less crowded
• Late afternoon (5:00-7:00 PM) — also good, with beautiful light for photography

What to Look For

Loggerheads surface every 4-7 minutes to breathe. You’ll see just the head briefly above water, sometimes the back of the shell. They’re most active in morning hours and tend to rest during the hottest part of the day.

The turtles in Laganas Bay are feeding on seagrass (Posidonia oceanica), which forms dense meadows on the seabed. The boats cruise slowly over these meadows, and turtles are often visible from the surface.

Ethical Behaviour on Boat Tours

Choose an operator who follows NMPZ guidelines. Ethical behaviour includes:

• Do not swim toward turtles — let them approach you if they choose to
• Do not attempt to touch turtles — this is illegal and disturbs the animal
• Maintain 20+ metres distance — don’t crowd or chase turtles
• No flash photography — underwater flashes disturb turtles
• Stay quiet — loud noises stress turtles and cause them to dive

If a tour operator encourages touching, chasing, or crowding turtles, choose a different operator. Report violations to the NMPZ.

Insider Tips for the Best Turtle Experience

The Dawn Experience (July-August)

Arrive at Gerakas Beach between 5:30-6:30 AM. The beach is empty and peaceful. Walk along the waterline and look for the distinctive tracks of nesting females — parallel lines in the sand made by flippers, leading up from the water and back down again. Sometimes you’ll see where a nest was laid and covered. It’s a quiet, reverent experience that costs nothing and connects you directly with the ancient cycle.

The Quiet Boat (May-September)

Choose the glass-bottom boat from Agios Sostis pier rather than the busy Laganas seafront. The Agios Sostis boats are smaller, less crowded, and the operators tend to be more patient and knowledgeable about turtle behaviour. The tour costs the same (sometimes less), and the experience is more intimate.

The Evening Watch (August-September)

In late August and September, join an ARCHELON volunteer at Gerakas for hatchling monitoring. Hatchlings typically emerge between 9:00 PM and midnight. Watching a nest of hatchlings make their frantic dash to the sea is one of the most moving natural experiences you can have. It’s not guaranteed — hatchlings emerge on their own schedule — but it’s worth the wait.

The Responsible Choice

The best turtle experience is the one that doesn’t disturb the turtles. Follow the rules, keep your distance, and remember that these are wild animals. The turtles were here long before tourism arrived, and they deserve to continue their ancient cycle undisturbed. Your responsible behaviour makes that possible.

Frequently Asked Questions

Q: Can I see turtles nesting at night?

A: Night access to nesting beaches is restricted to researchers and volunteers with permits. Guided night tours may be available through ARCHELON in certain circumstances, but unguided night visits are prohibited to protect nesting females from disturbance.

Q: What if I find a stranded or injured turtle?

A: Call the NMPZ emergency number (+30 26950 29200) or contact ARCHELON. Do not attempt to move the turtle yourself. Stay with the animal if possible until help arrives, but maintain distance and do not cause further stress.

Q: Are sea turtles dangerous to swimmers?

A: Sea turtles are not aggressive and pose no threat to swimmers. They will avoid contact if possible. If a turtle approaches you, stay still and enjoy the moment — it’s rare and special. Do not attempt to touch or ride the turtle.

Q: Can I volunteer if I don’t speak Greek?

A: Yes. ARCHELON volunteers come from around the world. English is the working language. Training is provided in English.

Q: What’s the best month to see turtles?

A: July is the best all-round month — nesting is at its peak, hatchlings begin emerging late in the month, and boat tour sightings are high. August is also excellent for hatchlings. June is better for nesting, September for late-season hatchlings.

The Bigger Picture: Why This Matters

The loggerhead turtles of Zakynthos are more than a tourist attraction — they’re an indicator species for the health of the Mediterranean marine ecosystem. Their decline in the 20th century signaled broader environmental problems. Their partial recovery shows that conservation works.

Every visitor who follows the rules, every volunteer who patrols a beach, every child who learns to respect wild animals — these are the small actions that make the difference. The turtles don’t know or care about our good intentions, but they benefit from our good behaviour.

So visit Zakynthos. See the turtles. Take the boat tour. Walk the beach at dawn. But do it with respect, with patience, and with the understanding that you’re a guest in an ancient, fragile world that was here long before us and will be here long after we’re gone.

That’s the real turtle experience — and it’s worth protecting.