Marbled hatchetfish (Carnagiella strigata), Gasteropelecidae, in aquarium.
I would appreciate if people could share their experience with hatchetfish jumping and if there are solutions other than keeping the top on the aquarium.
This species requires a well-matured aquarium with floating plants but providing some clear surface for swimming, very little water movement, and dim lighting. The top must be well covered; like all hatchetfish, this one will readily jump whether through play or interaction within the group, fright from other fish below, or if disturbed even by sliding the cover open for feeding. There are no external gender differences; females are rounder when viewed from above.
Marbled Hatchetfish - Microcosm Aquarium Explorer
Silver Hatchetfish - Microcosm Aquarium Explorer
Hatchets range in size from small species about2.5 cm/1" in length like up to about 9cm/3.5" in the case of . None of thehatchets are especially brightly coloured, though they are allattractive enough in their way. The marble hatchetfish, , is perhaps the standout species in terms of overallprettiness. Although barely 4 cm/1.5" in length, their deep bodyshape and chocolate brown markings mean that these fish can look verydramatic in the right aquarium. As with hatchetfish generally, openwater with a plenty of current is preferred, and while rockwork,ornaments, rooted plants, and other such things are unnecessary, a fewfloating plants will be appreciated. These fish stay very close to thesurface, and any food offered to them should be of the floatingvariety. Flake will be eaten, but this should be augmented withsuitable live or frozen foods, such as bloodworms, mosquito larvae, andwingless fruit flies. Marbled hatchetfish do have a preference for softand acidic water conditions, but they can be kept successfully inslightly alkaline, moderately hard water provided their other needs aremet. As with all the smaller hatchetfish, these fish are skittish andeasily bullied, so combine only with peaceful tankmates. Neons,cardinals, pencilfish, and other small, peaceful Amazonian fish wouldmake ideal tankmates.Hatchetfish are some of the more unique looking fish species available to freshwater hobbyists. They get to a couple of inches in size and some have the ability to fly or jump out of the water. They are a top dwelling fish and along with their known jumping habits an aquarium with a tight fitting hood is definitley needed to keep them from carpet surfing.The spotted hatchetfish, , is one of the biggest species and can reach up to 9cm/3.5" in length. Again, it is a silvery fish, though perhaps ashade more brilliant than the silver hatchet, and it is immediatelyrecognisable thanks to the pattern of small blue-grey spots on the backhalf of the body. Given its size and shape, this fish can be veryimpressive when kept in a decent sized group, and while not as commonlytraded as marble and silver hatchets, it is not too difficult toobtain. This species looks superb kept with things like angelfish anddiscus, but it could equally easily be kept with peaceful gouramis,climbing perch such as , clown loaches, orany other non-aggressive tankmate of suitable size. The spottedhatchetfish needs fairly soft, slightly acidic to neutral waterconditions and plenty of oxygen. It is a bit less forgiving than thesilver hatchetfish, and good filtration and plenty of water changesseem to be essential to long-term success with this species. A superbfish, to be sure, but one best suited to the more experiencedaquarist.The Silver Hatchetfish (Gasteropelecus levis) is one of the more unique looking freshwater fish in the aquarium hobby, and its unusual body shape and attractive coloration makes it highly sought after by aquarists. The name ‘hatchetfish’ originates from its laterally compressed body, which resembles the head of a hatchet.