Smallest vertebrate [Marine]

Last updated: October 13, 2017 at 20:47 pm

Angler fish (Photocorynus spiniceps). A mature male specimen collected at a depth of 1,425 m (4,675 ft) measured only 6.1 mm (0.24 in). Females are significantly larger reaching lengths up to 50.5 millimetres (2 inches). The smaller male spends its life latched on to its female counterpart. Much of its body consists of testes.

Pietsch, T. W., 2005, Dimorphism, parasitism and sex revisited: modes of reproduction among deep sea ceratoid angler fishes (Teleostei: Lophiiformes) Ichthyological Research. 52: 207-236.

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