World Turtle Day: Why Sea Turtles Need Divers On Side

Every year on the 23rd of May, World Turtle Day gives us a reason to talk about one of the ocean's most recognisable and most misunderstood animals. If you have ever hovered weightless a few metres from a green turtle grazing on seagrass, or watched a hawksbill glide unhurried across a reef wall, you already know why divers tend to care about these animals more than most. They are old, patient, faintly comic in the way they move, and increasingly under pressure from us. As the diving season warms up and early summer trip planning gets underway, it feels like the right moment to look properly at sea turtles, the threats they face, and what divers can actually do about it.

Why World Turtle Day Matters to Every Diver

World Turtle Day was founded to raise awareness of turtle species and the habitats they depend on, and while it covers freshwater and land tortoises too, it is the marine turtles that most divers will encounter on holiday. Sea turtles have been swimming in our oceans for well over a hundred million years, which puts them on the planet long before most of the wildlife we consider ancient. That kind of longevity as a species is exactly why their current, rapid decline feels so stark. Six of the seven living sea turtle species are currently classified as vulnerable, endangered, or critically endangered by the IUCN. A day set aside to think about them is a day worth taking seriously, especially if diving is how you spend your free time.

For a Reading-based dive centre with an international expeditions programme, this is not an abstract issue. Many of the trips our divers book are to destinations where sea turtles are a genuine highlight of the itinerary, from Red Sea reefs to Indo-Pacific atolls. That privilege comes with a responsibility to understand the animals a little better and to dive in a way that does not add to the pressure they are already under.

The Sea Turtles You're Most Likely to Meet

Of the seven species, a handful turn up regularly on recreational dive trips. Green turtles are probably the most commonly seen, named not for their shell but for the greenish fat beneath it, a result of their almost entirely seagrass and algae diet as adults. They can grow to well over a metre in shell length and are often remarkably relaxed around divers who keep a respectful distance and move slowly.

Hawksbill turtles are smaller and more delicately built, with a narrow, hooked beak that lets them pick sponges and invertebrates out of tight reef crevices. Their beautifully patterned shells made them a historic target for the tortoiseshell trade, which is one of the main reasons hawksbills are now critically endangered. Loggerheads, with their oversized heads and powerful jaws built for crushing shellfish, are the ones most likely to be found nesting on Mediterranean beaches that UK divers might visit on a summer holiday. Leatherbacks, the giants of the group, are less commonly seen while diving since they spend most of their lives in open water chasing jellyfish, but they are worth knowing about simply for how extraordinary they are, reaching weights of over 500 kilograms with a soft, leathery shell instead of a hard one.

The Real Threats Facing Sea Turtles Today

Plastic and Ghost Gear

Sea turtles cannot easily tell the difference between a jellyfish and a plastic bag drifting in open water, and that confusion kills a significant number of them every year through blockages and starvation. Discarded fishing gear, often called ghost gear, is arguably worse. Turtles get tangled in nets and lines, unable to surface to breathe, and drown within minutes. It is one of the more preventable causes of turtle mortality, which is exactly why beach cleans and responsible waste disposal matter as much as they do.

Coastal Development and Nesting Beaches

Female turtles return, often to the very beach where they hatched, to lay their eggs in the sand. Coastal development, artificial lighting, and beach furniture all interfere with that process, disorienting hatchlings that instinctively head towards the brightest horizon, which should be moonlight on open water but is increasingly hotel lighting instead. Rising sand temperatures linked to climate change are also skewing hatchling sex ratios, since turtle sex is determined by nest temperature rather than genetics, with warmer sand producing more females.

Bycatch and the Wildlife Trade

Accidental capture in commercial fishing gear, known as bycatch, remains one of the single biggest threats to sea turtle populations worldwide. Despite bans in most countries, the trade in turtle shell products and eggs also continues in some regions, driven by demand that conservation education is slowly working to reduce.

How Divers Can Actually Help

The good news is that recreational divers are unusually well placed to make a difference. Choosing dive operators who follow responsible turtle interaction guidelines, meaning no touching, no chasing, and no flash photography that startles a feeding or resting animal, sends a clear market signal that ethical practice matters to customers. Reporting turtle sightings and any tangled or injured animals to local marine conservation groups gives researchers real data they otherwise struggle to collect. Something as simple as reducing your own single-use plastic before, during, and after a trip removes one more piece of debris from ever reaching the water in the first place.

Divers who want to go further can look at citizen science programmes that log turtle encounters using shell pattern photography, since each turtle's facial scales are as individual as a fingerprint. Our own Conservation Academy runs courses built around exactly this kind of hands-on marine science, giving divers the skills to contribute real data on trips rather than simply observing. It is a genuinely satisfying way to combine diving with doing something useful.

Planning an Early Summer Trip With Turtles in Mind

If World Turtle Day has put turtles on your mind for this year's holiday, early summer is a sensible time to start planning. Many of the best turtle destinations have defined seasons, whether that is nesting activity, feeding aggregations, or simply calmer water and better visibility, so booking ahead gives you the best chance of a genuine encounter rather than a hopeful one. Our team regularly puts together trips where turtles are a realistic highlight rather than a marketing promise, and can talk you through where and when gives you the best odds based on current conditions and reports from the ground.

It is also worth using the months before a trip to sharpen the buoyancy and finning skills that make encounters better for the turtle as well as for you. A diver who can hover motionless a few metres away, without silting the seabed or finning towards the animal, tends to get longer, calmer sightings than one who swims straight at it. If your buoyancy could use some polishing before a big trip, it is worth mentioning to your instructor well in advance.

Frequently Asked Questions

Can I touch a sea turtle if it seems relaxed around me? No. Touching can strip the protective mucus layer from their shell and skin, and startle an animal that appeared calm. Keep a respectful distance and let it choose the encounter.

Do sea turtles bite? They can, particularly if they feel cornered or are guarding a feeding spot, but bites are rare and almost always provoked by a diver getting too close. Give them room and they have no reason to react.

Where will I see the most turtles on a warm-water trip? Seagrass meadows and healthy reef walls tend to be the most reliable spots, since both green and hawksbill turtles feed there regularly through the day.

Ready to see these incredible animals for yourself and dive with a purpose? Explore our Conservation Academy, browse upcoming holidays, or get in touch to talk through turtle-friendly trip options. We're at Bellman Court, Great Knollys Street, Reading, or call +44 (0) 118 9761 729.