Sealife guideThe Semaeostomeae orderThe taxonomy of marine species
Explore the taxonomy of cnidarians and especially sea anemones, corals and jellyfish !

Blue jellyfish
(Cyanea lamarckii)
(Cyanea lamarckii)

Lion's mane jellyfish
(Cyanea capillata)
(Cyanea capillata)

Atlantic sea nettle
(Chrysaora quinquecirrha)
(Chrysaora quinquecirrha)

Black sea nettle
(Chrysaora achlyos)
(Chrysaora achlyos)

Compass jellyfish
(Chrysaora hysoscella)
(Chrysaora hysoscella)

Purple-striped jelly
(Pelagia noctiluca)
(Pelagia noctiluca)

Sea nettle
(Chrysaora fuscescens)
(Chrysaora fuscescens)

Moon jellyfish
(Aurelia aurita)
(Aurelia aurita)
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Wednesday, February 18th 2026
The Atlantic tarpon
The Atlantic tarpon is a large coastal fish that can grow up to 8 feet long and weigh over 330 pounds, with a silvery body covered in large, reflective scales. Known as the Silver King, it is famous for its spectacular leaps and fierce fight when hooked by sport fishermen.

Friday, January 30th 2026
The dugong
Discover the dugong, a gentle “sea cow” of tropical waters. Learn about its habitat, diet, reproduction, morphology, and the threats facing this unique marine mammal.

Friday, January 23rd 2026
Dolphins: ocean's smartest creatures
Discover dolphins, the ocean's geniuses: explore their intelligence, social behavior, sophisticated communication, species diversity and vital role in marine ecosystems.
Photo of the Day

Ptérois nain
(Dendrochirus brachypterus)
(Dendrochirus brachypterus)
