How large can animal sponges grow?

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Most sponges are only a few centimetres in size, with some even measuring less than a centimetre. However, size varies significantly depending on the species, age, food supply, and environmental conditions.1

Larger species, such as those shaped like vases, tubes, or branches, can reach heights of one to two metres (3.3–6.6 feet). Additionally, broad, rounded masses—including some cake-shaped species within the class Demospongiae—can grow to one or two metres in diameter.12