An organism that grows on water or damp surfaces. Algae can been so tiny you can’t see them or as big as kelp which can grow over 30 metres long! Algae can be green, brown, or red. They use sunlight to produce oxygen, like plants, and play a very important role in the ocean food chain.

Sea animals that stay in one place their whole life. Some coral produce a colourful skeleton (which is also called coral) that will remain after they die. Coral are often found grouped in large areas called coral reefs, and they are related to sea anemones and jellyfish.

An animal (E.g. a shark, dolphin, or human) that naturally hunts and eats other animals.

A group of plants, animals and other living things that live in the same place and help each other to survive.

When we talk about gender we are talking about whether something is male (a man) or female (a woman).

A fish that looks like an eel. It spends most of its time hidden in caves and rock crevices at the bottom of the ocean, with only its head stuck out. It usually comes out at night, and eats things like fish, octupuses, squid, and crabs.

Someone who studies living things.

A long line of jagged rock, coral, or sand just above or below the surface of the ocean. An artificial reef is when a human-made structure creates a reef on the sea floor.