Gymnodoris subflava 
Habuprionovolva umbilicata 
Hairy Chiton 
Half-round Cardita 
Halgerda elegans 
Halgerda okinawa 
Halgerda terramtuentis 
Halgerda tessellata 
Halgerda wasinensis 
Halimeda Sap Sucking Slug 
Hard clam 
Heath's Dorid 
Heavy bonnet 
Helicarion perfragilis 
Helicarion permolle 
Helix aspersa 
Helix lucorum 
Hemibulimus dennisoni 
Hemiplecta cymatium 
Hemiplecta distincta 
Hemiplecta malaouyi 
Hermann Bornella Nudibranch 
Heron Ardeadoris 
Hooked Mussel