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Some say this is a nervous fish others that it is a good community fish.
They tend to stay near the surface and can jump out of the aquarium
if not careful. Seen more and more for sale these fish will make an
interesting addition to collection as long as you meet their needs.
Listed tank sizes are the minimum
||Females up to 2.8 inches (7 cm), males smaller.
||30" twenty gallon long (75 Litre). Long is better
||7.0 to 8.0
||Medium hard to hard, dH range: 6 - 18°
||70 to 86°F (21 to 30°C)
Half beak, Wrestling Half beak
Found in fresh and brackish waters of Thailand and Singapore to the
Greater Sundra islands.
General Body Form:
Slender, long and Pike like with moderate lateral compression. The most
obvious feature is the long protruding lower jaw. This jaw cannot move.
The upper jaw is short and is connected to and moves with the skull.
I have read that this is very unusual for a vertebrate. The Dorsal and
Anal fins are set way back near the start of the tail the tail fin is
somewhat oval in shape. The front bottom part of the Anal fins forms
a Gonopodium, thus making the Half beak a livebearer. The first one
is small and lies in line with the Ventral fins. The second Dorsal is
much larger and lies in line with the similar shaped Anal fin. In juveniles
and females the second dorsal and the anal fins are rounded, while in
adult males they are elongated and pointed to separations at the tips.
A very beautiful fish in its' own way . The most common coloration
seen have a Silver to gray body with hints of Green or blue in it.
The belly area is also Silver sometimes leaning toward White. The
sides have the same sheen of Blue or Green as the general body appearance.
The lower jaw has two colored lines on each side. One being Red and
the other Black. The Dorsal,Anal and caudal fins are a pale yellow
in color. Males Have a distinctive Red area in the front of the Dorsal
fin. The iris in the eye is Bright Green. The females are generally
paler in color overall .
The tank should be as large as possible with the length being much more
important than the depth. The rest of the tank can be planted anyway
you like but some of the plants around the edges should reach the surface.
The addition of some floating plants will also help mimic it's natural
habitat. Leave some open space areas for swimming. Not the easiest fish
to care for, they require the addition of some sea salt to maintain
their best health. Provide gentle filtration with a slight water currant.
. They will accept flake and frozen food, but they will fare better
with live insects like mosquito larvae, fruit flies and daphinia if
you can find it. The addition of a supplement containing vitamin D and
A is an absolute necessity if you wish to breed them. Care must be taken
when they are first introduced to the aquarium, if they get startled
and dash about they may injure their lower jaw and this will lead to
Shallow areas in the coastal areas of Southeast Asia. Found in both
fresh and brackish water.
Being a livebearer the Half beak gives birth to live young. Wild caught
specimens can give birth to a couple of viable broods, but subsequent
ones usually seem to fail. This is thought to be caused by the vitamin
deficiency described above. During spawning the male will swim up to
the female and nudge her sides with his beak. He will keep this up until
she accepts him. The gestation period is also quite long and can last
up to eight weeks. The broods are generally small. The newly born fry
can be fed almost immediately on the finest flake food or baby Brine
shrimp. At birth the upper and lower jaws are the same length which
develop as the fry mature.