Cases of young larvae often looking completely different from those of larger instars. Larvae tend to be eruciform (with a thickset head and thorax), rather slow-moving, and usually feed by browsing algae or scavenging animal remains.
Young larvae frequently have a distinctive appearance from older larval stages. These larvae tend to be plump with a prominent head and thorax, move sluggishly, and feed on algae or decaying organic matter.