Melanotaenia duboulayi (MELANOTAENIIDAE) Crimson-spotted Rainbowfish

Fish

Crimson-spotted Rainbowfish live east of the Great Dividing Range in southern Queensland and northern New South Wales. They eat insects, tadpoles, plants and worms and can grow to a length of 120 mm but are usually seen around 70 mm in length. Males have green-grey back and sides and a silver belly. Red lines run along the sides and the fins have red flecks, edged in black. Females have more rounded fins and have less colour.

Photo: Robert Whyte

Juveniles

Many small native fish are widely distributed in natural waters and are considered effective control agents for insect pests such as mosquitoes. Native fish species have none of the problems associated with the use of the introduced Mosquitofish Gambusia sp., provided they are not introduced to rivers where they do not naturally occur.

Photo: Mark Crocker

Adult

Crimson-spotted Rainbowfish nearly always congregate in schools of more than 20 or 30 individuals just below the surface. They prefer clear still ponds with muddy bottoms and weed, quiet billabongs, streams and backwaters near thick vegetation in areas exposed to sunlight.

Photo: Mark Crocker