A geographic region comprising the islands of the Pacific ocean, including Polynesia, Micronesia and Melanesia.

Océanie

A circular, eye-like marking on an animal's body, often used to deter predators or attract mates.

ocelle

A developmental transformation in an organism's form, structure, or coloration occurring during its life cycle, typically between juvenile and adult stages.

métamorphose ontogénétique

The complete sequence of developmental stages of an individual organism, from fertilization to adulthood.

ontogenèse

A large opening in a sponge through which water exits after circulating through its body.

oscule

Carrying and protecting eggs until they hatch.

ovigère

Laying eggs that develop and hatch outside the parent's body.

ovipare

Producing eggs that develop and hatch inside the parent's body, resulting in live birth.

ovovipare

Producing eggs that hatch inside the parent's body, so young are born live.

ovovivipare