There are 4 off the beaten path places tagged marine life:

Aldabra Atoll island

Aldabra Atoll has amazing endemic flora and fauna due to its isolation - over two thirds of the remaining giant tortoises in the world live on the islands, including a plethora of insects, snails,…
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The luminous water of Glistening Lagoon

The Glistening Waters in Jamaica is a lagoon full of bioluminescent microorganisms - they light up when the waters are disturbed. Bathing in the lagoon at night is a truly unforgettable experience.

Elephant Ear in the Zombie Hole

Zombie Hole is a diving site in Amani beach, Haiti - it is home to the largest sponge species in the world, Elephant Ear.
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The Jellyfish lake in Palau

The Jellyfish Lake in Palau is a unique lake full of moon and golden jellyfish, whose stinging mechanisms got devolved, and the divers can swim freely among the swarm.