Sealife guideExplore the wonders of sea life
Last updated on 09/25/2025 at 11:32 PM

Explore the amazing biodiversity of sea life ! © Grafner | 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.

The main phyla of marine life we will explore are:
- the arthropods
- the bryozoans
- the cnidarians
- the echinoderms
- the marine mollusks
- the sponges
- the tunicates
- the marine plants
- the marine worms
- the marine vertebrates
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.
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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Friday, November 7th 2025
The common sea fan
The common sea fan, is a type of soft coral found in the warm, shallow waters of the Caribbean and the western Atlantic ocean. It grows in wide, fan-shaped forms that sway gently with the ocean currents, helping it catch tiny food particles drifting by. Its beautiful purple branches are covered by a thin living tissue that hosts tiny algae, which provide much of the coral's energy through sunlight.

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The leopard blenny
The leopard blenny is a small reef fish from the Indo-Pacific ocean. It is easily recognized by its spotted coloration, which resembles that of a leopard. It lives on shallow coral reefs, feeds mainly on algae and polyps and skillfully camouflages among the corals to avoid predators.

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The Spanish slipper lobster is a colorful crustacean found around reefs in the tropical waters of the northwestern Atlantic. Its flattened body and distinctive antennae allow it to hide in crevices during the day and emerge at night to feed on benthic invertebrates.
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