🔎 TL;DR
- No touching, no fins, no flash. Enforced by law (CONANP / NOM-059-SEMARNAT).
- Minimum 2 m distance — give way to the animal, never block its path.
- Max 2 swimmers + 1 guide in-water with each shark.
- Reef-safe sunscreen only. Applied at least 30 min before water entry.
What happens on the boat
- Pre-departure: briefing by licensed guide covers all regulations.
- On finding a shark: boat stops, engines off within 100 m.
- Two snorkelers + guide enter gently from the side, not directly in front of the animal.
- Swim parallel, stay at shoulder or behind, never below.
- Exit after 10–15 min to allow others; boat tracks the shark only at idle.
Why scuba is banned
Whale sharks are filter feeders; they surface to feed on plankton blooms in summer. Scuba bubbles and deeper-range interaction stress the animals and push them away from feeding zones. Mexico's regulation (NOM-059-SEMARNAT) classifies the species as threatened and restricts interaction to snorkel only. Operators without permits face heavy fines and zone shutdown.
Book a permitted tour. Whale shark tour Cancún →
Frequently asked questions
Can I touch a whale shark gently?
No. Federal offence in Mexico. Guides terminate interaction if anyone touches.
Can I dive below the shark to photograph it?
No. Stay at surface level. Diving below stresses the animal.
What about the guides — they seem very close?
Licensed guides know how to read animal body language and maintain the 2-metre rule while assisting guests.
What if the shark comes to me?
Stay still, do not reach out. The shark will pass.
Going in season?
Your week, group size and boat preference — we book it.