Sea invertebrates

Sea cucumber (Thelenota sp.) spawning. Microscopic sex cells (gametes) are being released to allow fertilisation (the fusing of a male and a female sex cell).

Invertebrates are animals that don’t have a backbone. The vertebral column is another name for the backbone. Over 90% of all species on Earth are invertebrates, and invertebrate species have been found in the fossil record as far back as 600 million years ago.

Echinoderms

An invertebrate is an animal without a backbone. (An animal with a backbone is called a vertebrate.) Invertebrates live in every part of the world. In fact, most of the…

The ocean is filled with a vast variety of animals that live in the sea. From tiny organisms to massive sea creatures, each one has special adaptations to survive in their aquatic habitats. Marine mam

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Invertebrates are definitely some of the weirdest, creepiest, slimiest and most interesting creatures on earth. Worms, bugs, octopus and jellyfish all fall into the category of inveterate animals. When looking at the classification of the animal kingdom, there are 9 major phylum, and 8 of these are