Hypnos monopterygius

Hypnidae
Coffin Ray, Cramp-fish, Electric Ray, Numbfish, Numbie, Short-tail Electric Ray
  • Hypnos monopterygius, Jervis Bay, NSW, Photo: Andrew Green
    Hypnos monopterygius, Jervis Bay, NSW, Photo: Andrew Green
  • Hypnos monopterygius, Port Stephens, New South Wales, Australia, Photo: Tom Davis
    Hypnos monopterygius, Port Stephens, New South Wales, Australia, Photo: Tom Davis
  • Hypnos monopterygius, NSW, Australia, Photo: Ian Shaw
    Hypnos monopterygius, NSW, Australia, Photo: Ian Shaw
Distribution
Temperate Australasia, Tropical Indo-Pacific
Description
Double-lobed body, 2 rounded dorsal fins and tail, and small eyes set close together near midline. Delivers a powerful electric shock if touched, which stuns fish prey and incautious divers.
Information
  • Max Size: 70 cm
  • Sea Temperature Range: 15.4-25.2°C
  • Depth: 0-220m
  • Habitat: Coral Reef, Rocky Reef, Seagrass, Soft sediment
Rarity
  • Threats: By-catch
  • IUCN Threat Status: Least Concern
  • Occurrence: Infrequent (7% of sites)
    Occurrence describes how often the species is found on surveys within its distribution. It is calculated as the % of reef sites surveyed by RLS divers across all the ecoregions in which the species has been observed
  • Abundance: Solitary (1 per transect)
    Abundance is calculated as the average number of individuals recorded per RLS transect, where present.
Edit by: extract from RD Stuart-Smith, GJ Edgar, AJ Green, IV Shaw. 2015. Tropical Marine Fishes of Australia. Reed New Holland
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