"Species of Trapania typically congregate together like this to feed on kapmtozoans that grow over encrusting sponges. The animals shown in this image are a bit too small to see the colouration in detail, so it’s hard to decide whether they are dark coloured individuals of Trapania toddi or pale coloured individuals of Trapania brunnea."
Comment from Richard Willan
Species of Trapania typically congregate together like this to feed on kapmtozoans that grow over encrusting sponges. The animals shown in this image are a bit too small to see the colouration in detail, so it’s hard to decide whether they are dark coloured individuals of Trapania toddi or pale coloured individuals of Trapania brunnea.