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:

Glossodoris rufomarginata

Goniobranchus albopustulosus

Goniobranchus vibratus

Goniobranchus sp. #1

Hypselodoris imperialis

Hypselodoris violabranchia

Thorunna daniellae

Dendrodoris carbunculosa

Phyllidia varicosa

Phyllidiella pustulosa

Phyllidiopsis sphingis

Hexabranchus aureomarginatus

Hexabranchus sandwichensis

Tambja morosa

Thecacera pacifica

Marionia hawaiiensis

Samla bicolor

 Caloria indica

Favorinus japonicus

Pteraeolidia semperi