Apollo Shark

About

Native to turbid coastal rivers in northeastern and eastern Borneo, Luciosoma pellegrinii is a sleek, torpedo-shaped cyprinid built for life at the water's surface. The coloration is distinctive within the genus: an olive back with dark-edged scales grades into a yellow belly, with a row of dark spots along the flank forming a midlateral band that reaches the gill cover but stops short of the head. The caudal fin shows heavy dark pigment on the central rays, and the pelvic fins develop notably long filamentous extensions on the anterior rays. A feature more pronounced in this species than in any of its close relatives. In the wild it inhabits deeper, calmer stretches of streams and rivers, constantly patrolling the surface film to intercept fallen insects and other material. It has even been observed launching itself clear of the water to snatch prey dangling above the surface, which tells you something about both its agility and its feeding drive. Despite a beginner-friendly care rating, this species needs serious horizontal swimming space. Only very large aquaria are appropriate. It is genuinely rare in the trade, as commercial collection from its native range is minimal, and its name is frequently misapplied to other Luciosoma species sold under labels like 'apollo shark' or 'shark minnow'.