Small crustaceans living in or next to the water, including sand fleas and whale lice.

A generally circular cluster of spines on members of the cactus family.

Long plates of horny material that hang in rows from the roof of the mouth of some whales. They are used to strain food from the water.

Hard or chitinous covering or shield protecting the body of the animal, such as a crab.

Small silvery fishes in the Clupeidae family. The Herrings (Sardinas, Arenques)

Type of eye subdivided into many individual, light-receptive parts, such as that found in insects, crustaceans, etc.

Said of a plant species which has some individuals which bear only staminate flowers, and some which bear only pistillate flowers, and there are no perfect flowers. These are the species that are comm [..]

Belonging or native to a particular people or country.

A gamete is a cell involved in sexual reproduction and contains one copy of each chromosome. In males, the gamete is the sperm; in females, it's the egg.

Having a surface without hairs or projections; smooth.