The ringed dorid’s egg ribbons are commonly seen around the harbor. Each ribbon contains millions of eggs. These nudibranchs have their gills, or branchial plumes, on the rear of the animal, and have impressive antennae called rhinophores (nose bearing), with up to 30 thin layers of tissue. Each gives the great ability to ‘smell’ their surroundings. These are no doubt, very useful in finding their favorite sponges to feed on. They feed almost entirely on sponges.