ammocete

Example:The researchers studied the egg mass of the oyster to better understand its reproductive habits.

Definition:A group of eggs enclosed in a protective covering, such as the egg mass of a shellfish like a clam or oyster.

Example:The jelly sac was carefully removed to study the developing embryos inside.

Definition:A sac filled with jelly-like material, often used to encase and protect eggs or larvae, especially found in marine animals.

Example:Ammonites are an important part of marine biodiversity, though they are extinct and not currently living in the oceans.

Definition:The variety and variability of life forms within a given habitat, especially in a marine environment.