Melanotaenia synergos

Live fish have a blue back and pale lower body.

Live fish have a blue back and pale lower body. A blue-black midlateral stripe extends from the upper preopercular edge to the caudal-fin base, with stronger stripe contrast in males.

Adult length

Up to 6.7 cm (standard length, without the tail fin)

Natural habitat

Inhabits clear forest rivers, often deeper pools over limestone cobbles and gravel with slow to moderate flow.