Fin's Fish Guide
The Glasshead barreleye (Rhynchohyalus natalensis) is a saltwater fish of the family Opisthoproctidae that grows up to 16 cm.
Description
The glasshead barreleye is a remarkable deep-sea fish from temperate and tropical oceans. The species grows to about 16 cm and has a transparent, fluid-filled dome on top of the head containing two upward-directed tubular eyes; it also has lateral mirror-eyes to capture light from the side. Thus it watches in the gloom for the silhouettes of prey above. It lives in the deep open water and eats small zooplankton. The fish is harmless to humans and has not been evaluated by the IUCN (NE).
Frequently asked questions
How do you recognise the Glasshead barreleye?
The Glasshead barreleye has a flattened, disc-shaped body, is mainly black and shows a plain pattern. Transparent head dome with upward-pointing tubular eyes and sideways-facing mirror eyes
Where does the Glasshead barreleye live?
The Glasshead barreleye lives in the sea (marine waters) and is mostly found around open water. Worldwide (deep sea)
How big does the Glasshead barreleye get?
The Glasshead barreleye grows to a maximum of about 16 cm.
Is the Glasshead barreleye dangerous to humans?
No, the Glasshead barreleye is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.
Is the Glasshead barreleye edible?
The Glasshead barreleye is not usually eaten.
More photos
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
More from the family Opisthoproctidae
Want the complete picture on the Glasshead barreleye?
Point your camera at the fish and Fin names the species in seconds. Free, and the Glasshead barreleye is one of 12,519 species in the app.