Sealife guideThe sea life glossaryOur glossaries
Last updated on 03/02/2026 at 11:03 PM
English
Description
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Oceania
Définition
A geographic region comprising the islands of the Pacific ocean, including Polynesia, Micronesia and Melanesia.
Anglais
Océanie
Français
ocellus
Définition
A circular, eye-like marking on an animal's body, often used to deter predators or attract mates.
Anglais
ocelle
Français
ontogenetic metamorphosis
Définition
A developmental transformation in an organism's form, structure, or coloration occurring during its life cycle, typically between juvenile and adult stages.
Anglais
métamorphose ontogénétique
Français
ontogeny
Définition
The complete sequence of developmental stages of an individual organism, from fertilization to adulthood.
Anglais
ontogenèse
Français
osculum
Définition
A large opening in a sponge through which water exits after circulating through its body.
Anglais
oscule
Français
ovigerous
Définition
Carrying and protecting eggs until they hatch.
Anglais
ovigère
Français
oviparous
Définition
Laying eggs that develop and hatch outside the parent's body.
Anglais
ovipare
Français
ovoviparous
Définition
Producing eggs that develop and hatch inside the parent's body, resulting in live birth.
Anglais
ovovipare
Français
ovoviviparous
Définition
Producing eggs that hatch inside the parent's body, so young are born live.
Anglais
ovovivipare
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Our latestUpdates
Monday, March 2nd 2026
The blueface angelfish
The blueface angelfish is a very colorful fish of the tropical coral reefs of the Indo-Pacific, recognizable by its bright blue head and its bluish body finely reticulated with yellow.
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.
Photo of the Day
Requin pointe blanche océanique
(Carcharhinus longimanus)
(Carcharhinus longimanus)
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