Goniobranchus hintuanensis 
Goniobranchus leopardus 
Goniobranchus preciosus 
Goniobranchus roboi 
Goniobranchus rufomaculatus 
Goniobranchus sinensis 
Goniobranchus splendidus 
Goniobranchus tinctorius 
Goniobranchus tumuliferus 
Goniodoridella geminae 
Goniodoridella savignyi 
Goniodoris joubini 
Grand Coral Worm Snail 
Great Pond Snail 
Great ramshorn 
Greater argonaut 
Greater blue-ringed octopus 
Green Cellar Slug 
Green Falsejingle 
Greenhouse slug 
Grey bonnet 
Grey Garden Slug 
Gymnodoris inornata 
Gymnodoris rubropapulosa