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The Florida manatee ( Trichechus manatus latirostris  Linnaeus 1758) actively selects and consumes the “chicken-liver” sponge  Chondrilla caribensis . Manatees ate over 10% of  C. caribensis  on a sample dock, mostly from pylons that received no direct sunlight. Since manatees reportedly eat mostly seagrasses and algae, it was thought that the chlorophyll -a  content of the symbiotic cyanobacteria in  C. caribensis  might be correlated to the amount eaten; however the correlation was not significant ( P  > 0.05) . C. caribensis  has variable chemical defenses and round spherasters (spicules), but these do not appear to be effective deterrents to predation by manatees. This is the first direct evidence that manatees actively seek out and consume a sponge.

Florida manatees Trichechus manatus latirostris actively consume the sponge Chondrilla caribensis