Male Pygmy Halfbeak photographed in a forest stream, Singapore.
Family : HEMIRHAMPHIDAE
Species : Dermogenys pusillus
Maximum Length : 7 cm
References : F1
This surface dwelling,
carnivorous fish is adapted to habitats varying from acidic, tropical forest
streams to brackish mangrove streams.
It is identified by its
small size and shape of the jaw. Males often have a red blotch on the dorsal
fin (as shown here), and can be aggressive towards other males. The species
is ovoviviparous, meaning the young fry hatch internally in the female and
are then born alive.
The Pygmy Halfbeak can be
distinguished from the similar Forest Halfbeak
Hemirhamphodon pogonognathus by the position of the dorsal fin which
begins behind the anal fin.
The species occurs in many
Southeast Asian countries including Thailand, Malaysia, Singapore and