The largest species of sponge (Porifera) is the giant barrel sponge (Xestospongia muta). It grows at depths from 10 m (33 ft) down to 120 m (390 ft), and can reach a diameter of 1.8 – 2 m (6 – 6.6 ft).
Source: https://dinoanimals.com
A large specimen might weigh 80 kg (180 lb). Either, the giant barrel sponge has been called the “redwood of the reef” because of its lifespan of up to 2000 years as well as its size and color.
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