Size: 5 mm
Distribution: Gulf St. Vincent. Few SA records
Habitat: On turfing algae and seagrass
Depth: Lower intertidal to 10+ metres
Ilbia ilbi is a runcinoid slug, part of a small group of sea slugs related to the headshield (cephalaspid) slugs. This small species is a striking purple, with a dark or black patch and longitudinal yellow lines on its back.