Ocean Animals Online Quiz

While a general group of fish is called a school, a specific group of trout is referred to as a hover. Other terms like smack (jellyfish) and mob (kangaroos) refer to different animal groups.

In seahorses, the female deposits her eggs into the male's brood pouch, where he fertilizes them, carries them to term, and eventually undergoes contractions to give birth to the young.

Jellyfish are simple aquatic organisms that lack a centralized brain, a heart, and a circulatory system. Instead, they rely on a decentralized nerve net to sense and react to their environment.

The blue whale is the largest animal known to have ever lived on Earth, reaching lengths of up to 30 meters and weighing up to 200 tons. While the whale shark is the largest fish, it is not a mammal and is smaller than the blue whale.

The vast majority of described marine species belong to the animal kingdom, particularly marine invertebrates such as mollusks, crustaceans, and corals. While marine microbes and protists are extremely abundant in individual numbers, animals represent the majority of classified species.