Coregonus hoyi

The bloater is a small, silvery-coloured whitefish with a pink and purple iridescence. It has a greenish tinge above, and a whitish belly. It is very similar to the kiyi, from which it may be distinguished by its lighter upper lip and smaller eye. Its body is deepest at its middle, it has small and pale fins, and it has 40–47 long gill rakers. The discoverer of the bloater, P. R. Hoy, thought it to be "the most beautiful of the white fish". It reaches a maximum total length of 37.0 centimetres (14.6 in) and commonly is 25.5 centimetres (10.0 in).