Epigonus telescopus, the black cardinal fish, is a species of deepwater cardinalfish found in most temperate oceans worldwide, at depths of between 75 and 1,200 metres (246 and 3,937 ft) though mostly between 300 and 800 metres (980 and 2,620 ft). It can reach a length of 75 centimetres (30 in) TL though most specimens do not exceed 55 centimetres (22 in) TL. It has been reported that this species can reach an age of 104 years.