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Genus

Carnegiella

Species
3
Photographed
3 of 3
Difficulty rated
3 of 3
This species is among the more diminutive freshwater hatchetfishes.

Carnegiella marthaeBlackwing Hatchetfish

Myers, 1927

Max length
28mm SL1.1in SL
Tank
60 × 30cm24 × 12in
Temp
20–28°C68–82°F
pH
4.0–7.0

Gasteropelecids are commonly-referred to as 'freshwater hatchetfishes' due to their heavily-keeled body shape which has evolved in such a way due to possessing an enlarged, heavily-muscled pectoral girdle, and which resembles the shape of a hatchet head. They are sometimes said to be capable of propelled flight above the water surface by beating their pectoral fins but in fact this is not the case and was disproven by Wiest (1995) who used...

Easy
This species possesses an elongate body shape relative to congeners.

Carnegiella myersiPygmy Hatchetfish

Fernandez-Yepes, 1950

Max length
25mm SL1.0in SL
Tank
50 × 30cm20 × 12in
Temp
23–26°C73–79°F
pH
4.0–7.0

The smallest and most delicate of the nominal hatchetfishes. The rounded keel is shallower than related species, giving this fish a distinctive elongate profile. The family Gasteropelecidae is separated from other Characiformes by the following combination of characters: front...

Easy
What we currently know as C. strigata may turn out to represent a group of closely-related species (see 'Notes').

Carnegiella strigataMarbled Hatchetfish

Günther, 1864

Max length
35mm SL1.4in SL
Tank
75 × 30cm30 × 12in
Temp
20–28°C68–82°F
pH
4.0–7.0

C. strigata is an enduringly popular species in the aquarium hobby but is not bred on a commercial basis with all fish offered for sale collected in the wild. It can be told apart from other members of the genus by its larger adult size and dark, marbled colour pattern appearing as a series of dark and light stripes running diagonally across the body below the lateral line. This colour pattern is variable and popul...

Easy