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Snorkel Mosman - Decorator crab and sponges

Decorator crab and sponges

Sponges – plants or animals?

Sponges are in fact animals! They are simple filter feeding animals that tend to attach themselves to hard surfaces like rocks, or in the case of Chowder Bay, pylons and the swimming net.

Did you know? There are close to 1000 different types of sponges found in southern Australia.

Decorator crabs

Hidden amongst the sponges you might be lucky enough to see a decorator crab. They will use their pincers to cut sponges or seaweed before sticking it to their body to camouflage themselves.


Information sources:

  • Davey, K. 2009. A photographic guide to Seashore Life of Australia. New Holland Publishers, Sydney.
  • Norman, M and Reid, A. 2000. Guide to squid, cuttlefish and octopus of Australasia. The Gould League of Australia, Sydney.