
Atlantic Eco Diving
Conservation-led dive centre at Puerto Colón, Costa Adeje, running one-to-one shallow eco baptism dives and adapted diving from a small boat.
Also known as: Puertito de Adeje, Puertito de Armeñime
A sheltered volcanic bay off Adeje, Tenerife, once a famous turtle colony whose presence today divers genuinely disagree about.
Last updated July 2026
Boats settle inside the bay around 6 metres, over sand that opens quickly into a seagrass meadow. Cuttlefish, seahorses and lizardfish tend to work this first stretch. The profile rises gently from there toward a rocky ledge ringing the mouth of the bay, where the terrain gets more textured: short crevices and small caves hold moray eels and octopus, and trumpetfish, damselfish and nudibranchs concentrate wherever the rock gets broken up. Barracuda schools move along this transition often enough to be a regular feature rather than a lucky extra. It's a short swim from sand to structure, nothing technical about the route, and shallow enough that a slow pace costs you nothing in bottom time.
Most Tenerife sites sell you a story about what you'll definitely see. Puertito sells you an honest one instead. What happens with the turtles now is genuinely unresolved: one dive centre still reports them working the bay regularly, another says they've become rare. Neither is spinning a sales pitch. That kind of transparency is unusual, and the reef holds up on its own between seagrass, ledge structure and a steady barracuda presence, so the dive works even on the days the turtles don't show.
A resident turtle colony really did live in this bay, built up over years because visitors fed the animals and encouraged them to overstay their natural migration. It ended badly. In 2016, a turtle known locally as "Legends" was found dead in an illegal fishing net here, and the incident drew enough public criticism that the surviving turtles were moved to La Gomera for a calmer recovery. Feeding wildlife is what caused the harm here, not a reason to expect it now. Separately, in September 2024, Spain's national geological survey listed the bay's exposed volcanic deposits as a protected site of geological interest, and the undeveloped land behind the beach has become the focus of a long-running local campaign against a proposed resort. None of that changes the dive itself, but it explains why this small bay gets talked about far more than its size suggests.
Small-boat traffic is a notable factor in this bay, so stay close to your guide and check the surface before ascending. Visibility swings more than the marketing suggests. Pack a torch for the ledge crevices even in daylight; that's where the moray eels and nudibranchs tend to sit. If the turtle story interests you, ask your operator what they've actually seen lately rather than what the brochure promises.
What makes this dive site stand out.
One operator reports turtles regularly, another says sightings are now rare
A fed colony formed here before a fatal net incident and a relocation to La Gomera
Seagrass meadow at 6m rises to a rocky ledge with small caves near 15m
Spain's geological survey added the bay's volcanic deposits to its heritage list in 2024
28.1127°N, 16.7694°W
Diveable year-round; the bay is sheltered from the prevailing north-east wind
Contact a local operator for current pricing
Also runs as a Discover Scuba Diving and try-dive site under supervision
Summary
Calm, shallow, and beginner-friendly, though visibility is not always reliable
Safety considerations
What can go wrong here, and what divers do about it. Conditions change - take the briefing from the operator on the day.
Book a guided dive at this site.

Conservation-led dive centre at Puerto Colón, Costa Adeje, running one-to-one shallow eco baptism dives and adapted diving from a small boat.

PADI and SSI base at Puerto Colón marina, Costa Adeje, with its own dive boat within 15 minutes of more than 20 south-west Tenerife sites.

PADI 5-Star centre in Costa Adeje since 1996, formerly Diving Club Adeje, diving 17 named sites by minibus, jeep and boat.

SSI Diamond Instructor Training Center in Abades, southeast Tenerife, run by owners Csaba and Levi, with a house-reef bay known for turtles, rays, and winter angel sharks.

Polish-run, dual PADI/SSI dive centre in Costa del Silencio, reached directly from shore at the protected Montaña Amarilla bay, its house reef.

Get in touch to add or claim your dive center listing on DiveCodex.
No. This is one of the more honestly debated sightings in south Tenerife. A colony formed here after visitors fed the animals for years, but a turtle was found dead in an illegal fishing net in 2016 and survivors were relocated to La Gomera. Some operators still report turtles regularly; another states plainly they are now rarely seen. Expect an honest maybe, not a promise.
A resident colony built up here because visitors illegally fed the turtles, encouraging them to stay far longer than their natural migratory pattern would produce. After one turtle died in an illegal fishing net in 2016, the surviving animals were moved to La Gomera. Feeding wildlife is never something to seek out or repeat.
Yes. The site is a shallow, sheltered bay with an easy sand-to-ledge profile, and it doubles as a Discover Scuba Diving and try-dive location. Certified divers get more from the rocky ledge and its crevices.
No permit or diver quota applies here. The bay falls within the Teno-Rasca conservation zone, a habitat-protection designation, not a regulated marine reserve, so there's nothing to book or pay beyond your dive itself.
In 2024 Spain's national geological survey listed the bay's volcanic deposits as a protected site of geological interest, and the coastline behind it has become a well-known local conservation cause. Underwater, the draw is a genuine mix of seagrass life and rocky-ledge species rather than one headline animal.
Not consistently. Most sources describe good visibility, but at least one local operator specifically flags this site as one where conditions can run murky. Check with your operator before the dive if clarity matters to you.
Log your dives - notes, photos, conditions and the marine life you saw - and share them as one public diver profile. What you share helps the next diver, too.
Log every detail
Depth, duration, conditions, gear, buddy, notes — all in one place. Import from Suunto and other dive computers.
Track marine life
Record species sightings on each dive. Build a personal catalogue of everything you've seen underwater.
Your public dive profile
Share your dive history, stats, and experiences with a profile page you control. Show the world where you've been.