Some cool marine animals images:
Sponges are animals!
Image by wildsingapore
Sponges look like some sort of weird lifeform from another planet. Often mistaken for plants, they are actually animals. They don't move around and usually grow on hard surfaces like coral rubble and rocks. They feed by sucking in water and filtering out the edible bits.
Many sponges are colourful and they often come in bizarre shapes.
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