Updated November 2026 · By Terry Barkhuizen, NOM-08 certified tour guide (credential N012608).
Beyond the beaches, the Riviera Maya is one of Mexico’s richest natural regions. Here you’ll find the second-largest barrier reef in the world, sea-turtle nesting beaches, mangroves and lagoons, a vast underground river system and the protected jungle of the Sian Ka’an Biosphere Reserve. Seeing it well means seeing it responsibly. Many of the region’s most popular wildlife experiences put pressure on the animals they depend on. This page gathers our nature guides and the principles behind them.
Wildlife guides
- Ethical wildlife tourism – a checklist and questions to ask
- Swimming with whale sharks – season, rules and operators
- Snorkelling with turtles in Akumal – rules, costs and timing
- Sea turtle nesting season – when, where and how to help
- Sian Ka’an tours compared – Muyil float vs Punta Allen
Start here
- Why responsible wildlife tourism matters – how to choose ethical encounters and avoid the ones that harm animals.
- Cenotes of the Riviera Maya – the freshwater side of the ecosystem, with rules that protect it.
Where to see wildlife
| Wildlife / habitat | Where | Guide |
|---|---|---|
| Green sea turtles in seagrass | Akumal Bay | Akumal guide (turtle snorkelling rules) |
| Coral reefs and reef fish | Cozumel’s west coast | Cozumel guide |
| Birds, lagoons, mangroves, Maya canals | Sian Ka’an Biosphere Reserve | Sian Ka’an guide |
| Stromatolites (living fossils) | Bacalar Lagoon | Bacalar guide |
| Whale sharks (seasonal) | Off Isla Mujeres and Holbox | Whale shark guide · Isla Mujeres guide |
| Jungle wildlife – coatis, spider monkeys, birds | Coba and the Maya sites | Coba guide |
| Freshwater turtles and fish | Cenotes near Tulum | Best cenotes near Tulum |
Five principles for responsible encounters
- Look, don’t touch. No touching, feeding, chasing or riding wild animals – on land or in the water.
- Keep your distance from turtles, whale sharks and nesting sites, and follow the limits set by guides and rangers.
- Skip captive “swim with” attractions that use wild animals for entertainment. Choose wild encounters with authorised, small-group operators.
- Protect the water. Use mineral sunscreen or a rash guard at sea, and none at all in cenotes.
- Pay the fees. Marine park and reserve fees fund rangers and conservation.
Seasons worth knowing
See the best time to visit, month by month for weather, sargassum and crowds.
- Sea-turtle nesting: turtles nest on Riviera Maya beaches roughly from May to October, and hatchlings emerge mostly from July to November. Keep away from marked nests, and don’t use lights on the beach at night.
- Whale sharks: roughly mid-May to mid-September off the northern tip of the peninsula, strongest in July and August. Book only with authorised operators that follow the swimming rules.
- Birds: winter brings migratory species to the lagoons and wetlands of Sian Ka’an.
- Sargassum: the summer seaweed season affects beaches, not the jungle, cenotes or lagoons – see our sargassum guide. See travel planning.
Test your knowledge
Try our Riviera Maya wildlife quiz or the wildlife word search – great for kids before a trip.
Related guides
- All Riviera Maya destination guides
- Getting Around – reaching the reserves and parks
- Staying safe – sea conditions, heat and wildlife safety