In the tea-coloured waters of a West African rainforest, a striped pufferfish glides beneath the roots of ancient trees. To the untrained eye, it looks just like the Nile Puffer that prowls the continent’s floodplains thousands of kilometres away. Yet this quiet fish of the Cross River is something else entirely, a species hidden in plain sight.

Inflation defines the pufferfish family. It is a physiological masterpiece evolved from simple reflexes into a precise survival system, capable of transforming a small, soft-bodied fish into a rigid, unmanageable sphere in seconds. Yet in the aquarium, it carries profound welfare implications that every keeper should understand.

Along the shifting floodplains of the Lower Mekong, Pao turgidus lives by rhythm rather than chase. It moves when the water moves and waits when it slows, blending completely with the riverbed until a flicker of motion betrays its prey. To keep it well is to capture that balance of stillness and flow.