Sealife guideExplore the wonders of sea life

Last updated on 09/25/2025 at 11:32 PM
Explore the amazing biodiversity of sea life !
Explore the amazing biodiversity of sea life ! © | Dreamstime.com
Marine life is organized in the form of a tree, better known as a phylogenetic tree, where each branch, called a phylum, groups together marine species that share common characteristics.
An ocean sample with its marine fauna and flora
The main phyla of marine life we will explore are:
In turn, the phyla are divided into classes and families.
The different phyla are arranged from the least to the most evolved, meaning that phyla containing the least evolved marine species are represented by the lower branches of the tree, while those containing the most evolved are found at the higher branches.
Consequently, the higher we climb in the branches of the marine life tree, the more evolved the species become.
Marine plants represented by a Posidonia seagrass meadow
Marine plants represented by a Posidonia seagrass meadow
The spiny lobster, an arthropod of the crustacean class
The spiny lobster, an arthropod of the crustacean class
The large sponge family with the yellow tube sponge !
The large sponge family with the yellow tube sponge !
A school of barracudas in the Mediterranean sea
A school of barracudas in the Mediterranean sea
If you're looking for information on a specific alga, sponge, shellfish, crab, sea star, sea urchin, sea anemone or fish, we invite you to explore the full range of marine flora and fauna in our marine life guide !
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Explore the latest marine life news, from fascinating flora and fauna to underwater photo exhibitions, contests and festivals. Follow scientific expeditions, browse our identification guides and dive into must-read books.
The Guide des poissons de Nouvelle-Calédonie
The Guide des poissons de Nouvelle-CalédonieDiscover Guide to the Fishes of New Caledonia by Pierre Laboute and René Grandperrin, an illustrated reference featuring nearly 1,200 species, from rivers and coral reefs to the depths of the ocean.
The neon goby
The neon gobyDiscover the neon goby (Elacatinus oceanops), a small western Atlantic reef fish known for its brilliant blue stripe and its role as a cleaner fish that removes parasites from other fish.
The poison goby
The poison gobyDiscover the poison goby (Gobiodon citrinus), a tiny reef fish with a bright yellow body and distinctive blue markings. It lives among branching Acropora corals in the tropical waters of the ...
The wahoo
The wahooDiscover the wahoo (Acanthocybium solandri), a powerful pelagic predator found in tropical and subtropical oceans. Recognizable by its streamlined body and distinctive blue vertical stripes, it is a ...
The white trevally
The white trevallyDiscover the white trevally (Pseudocaranx dentex), a silvery fish with a blue-green back that schools near reefs and rocky bottoms.
The basking shark
The basking sharkDiscover the basking shark (Cetorhinus maximus), the world's second-largest fish. This huge shark feeds on plankton by filtering large amounts of water.
The Banggai cardinalfish
The Banggai cardinalfishDiscover the Banggai cardinalfish (Pterapogon kauderni), a small marine fish endemic to the Banggai Islands, known for its black-and-white stripes and unique reproductive behavior.
The coral hind
The coral hindDiscover the coral hind (Cephalopholis miniata), a colorful Indo-Pacific grouper known for its reddish-orange body covered with small blue spots.

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Poisson lime à taches orange (Oxymonacanthus longirostris)
Poisson lime à taches orange
(Oxymonacanthus longirostris)