Commonly Seen Species
The following 40 opisthobranch species are among the most commonly seen by divers. Some of them are seen "all the time" while others only occasionally. Also, we've selected them just based on their frequency in photo galleries and our experience--other choices are possible. Please remember that they represent only about 7% of the species in Hawaiian waters. So, if you can't find an exact match go here:

Aplustrum amplustre

Micromelo scriptus

Siphopteron quadrispinosum

Chelidonura hirundinina

Lamprohaminoea cymbalum

Aplysia argus

Aplysia elongata

Stylocheilus striatus

Plakobranchus ocellatus

Thuridilla neona

Umbraculum sp. #2

Berthellina delicata

Asteronotus cespitosus

Halgerda terramtuentis

Hiatodoris fellowsi

Platydoris formosa

Ardeadoris poliahu

Ardeadoris tomsmithi

Ceratosoma tenue

Diversidoris flava