Description:

Labeo chrysophekadion has black body and fins. It has big dorsal fin which is invariably carried erected that gives the fish a shark-like outline. Juveniles are all black, while large adults are rather grey to black with one iridescent spot on each scale. They temper are also similar to sharks, as Black Sharks are among the most aggressive aquarium fish, ready and willing to kill much larger and stronger tankmates with constant and well-aimed attacks.

Labeo chrysophekadion continues to be available in the ornamental fish trade despite its patent unsuitability for the home aquarium. Black Sharks are often sold in the aquarium trade as juveniles, but they quickly outgrow even the largest aquarium. There is an albino form that has been selectively bred for the hobby. In their natural habitat they can reach 90 cm in length and 7 kg in weight. They are also a desirable food fish in Southeast Asia.

Sexually mature females are likely to be deeper-bodied and may grow larger than males.

Labeo chrysophekadion begin spawning at the onset of the wet season. They spawn upstream where the females depost their eggs near shallow sandbars. The eggs settle out in the shallow water and hatch just as water levels begin to rise following the initiation of seasonal rains. The fry immediately move into inundated grasses along the bank and continue to follow the leading edge of the advancing water as floodwaters spread over the land.

Sources:
http://www.fishbase.org/summary/12102
http://www.seriouslyfish.com/species/labeo-chrysophekadion/
The Barbs Aquarium
http://www.thefishguide.com/black-shark
http://www.tropical-fish-keeping.com
/black-shark-labeo-chrysophekadion.html