Ptereleotris hanae

Ptereleotris hanae, commonly known as the blue gudgeon dartfish or blue hana goby, is a species of dartfish native to the western Pacific Ocean. It is a reef inhabitant, being found at depths of from 3 to 50 m, though usually no shallower than 6 m. It inhabits burrows made by alpheid shrimp, but unlike the Amblyeleotris gobies who normally associate with these shrimp, this species has no interactions with their shrimp hosts. This species can reach a length of 12 cm TL. It can also be found in the aquarium trade.