Rainbowfish / Melanotaeniinae / Emerald Rainbow

Emerald Rainbowfish, Lake Wanam Rainbowfish
Glossolepis wanamensis

Synonyms: None
Physical description: This species has the "typical" rainbowfish body shape with compressed flanks and an arched back.  There are two dorsal fins, the second being much larger than the first.   The caudal fin is forked and the anal fin is large and elongated.  The back is dark emerald green to forest green and the upper flanks are green.   The lower flanks are yellow-green, and the whole body has a emerald iridescence.   The rear parts have blue hues and the fins are green and blue with a violet fringe. 
Size/Length: Males reach 4" (10 cm), females reach 3.2" (8 cm)
Similar species: G. multisquamatus
Habitat: Endemic to Lake Wanam, Papua New Guinea (New Guinea)
S: middle, top
Aquarium: A 36" (91 cm) or 35-45 gallon (132-170 L) tank is sufficient, although larger tanks are suggested.  Follow suggestions for G. incisus.
Water chemistry: pH 7.3-8 (7.8), 10-18 dH (12), 77-86°F (25-30°C)
Social behavior: An active, schooling species that can be combined with other peaceful fish that tolerate slightly alkaline water.  Keep in groups of four or more. 
Suggested companions: Chilatherina, Glossolepis, Melanotaenia, Corydoras, Synodontis, Aulonocara, Neolamprologus
FOOD: Live; insect larvae, crustaceans, worms, insects; flakes
SEX: Males are larger with more elaborate finnage.
Breeding techniques: As for G. incisus except use water temperature between 81-86°F (27-30°C).
Breeding potential: 7.  Breeding is moderately difficult.
Remarks: This species requires frequent partial water changes and clean water to develop its elegant colors.
Difficulty of care: 6.  This species is somewhat sensitive to water conditions.

By Rhett Butler   Mongabay.com