Paroon Shark Care Guide - Size, Habitat & Breeding Notes

The Paroon Shark is a huge, powerful pangasiid catfish with a streamlined, silvery body, a broad head and a deeply forked tail. Despite its shark-like profile and common name, it is not a marine shark; the resemblance comes from its fast-swimming shape and prominent dorsal fin. Young fish often show darker markings and a more contrasting appearance than adults, which become mostly silver-grey.

Paroon Sharks are native to major river systems of mainland Southeast Asia, especially the Mekong and Chao Phraya basins in countries including Thailand, Laos, Cambodia and Vietnam. They inhabit large freshwater rivers and associated floodplain environments.

This species is not appropriate for a home aquarium. Even a juvenile needs a very large, secure system, and an adult requires a professionally designed public-aquarium or zoological exhibit of at least around 100,000 litres, with a footprint of roughly 12 metres by 4 metres or larger and substantial open swimming length. Use smooth, impact-resistant surfaces, powerful but well-distributed filtration, excellent oxygenation and minimal hard decor; sharp rocks, tight spaces and exposed equipment can cause severe injuries to a fast-moving fish. The water should be soft to moderately hard, clean and well oxygenated, with a gentle current and ample turning space.

Up to 300 cm (118 in) in total length. Females are generally larger and heavier than males, although reliable sex-specific adult size records are limited.

Paroon Sharks are opportunistic predators that consume fish, crustaceans and other aquatic animals, while also taking a variety of available food in the river. Captive specimens should receive a varied diet of appropriately sized whole fish, prawns, mussels and quality formulated food designed for large predatory catfish. Feeding must be carefully managed because overfeeding rapidly contributes to poor water quality and excessive growth.

Paroon Sharks are unsuitable for typical community aquariums because their adult size, speed and predatory feeding make them a danger to smaller fish and a hazard to tank furnishings. In a suitably immense public or professional exhibit, they may be housed with other very large, robust freshwater species of compatible temperament, provided every fish has ample swimming room. Small fish, delicate species, fin-nippers and any tankmate that can be swallowed are inappropriate.

Paroon Sharks are not realistically bred in ordinary aquariums. In nature they are long-distance river migrants whose spawning is linked to seasonal flooding and changes in water flow. Captive breeding, where attempted, requires enormous specialist facilities, mature broodstock, carefully managed water conditions and often hormonal induction; it is a professional conservation or aquaculture undertaking rather than a practical home-aquarium project.

Mature females are typically deeper-bodied and heavier than males, while males tend to remain slimmer. External differences are subtle, particularly in juveniles, and dependable sexing usually requires experienced examination of mature fish.