Needle-tooth moray - Nadelzahnmuräne - Uropterygius macrocephalus (Mauritius, Pereybere)
Uropterygius macrocephalus
Largehead Snakemoray
Uropterygius macrocephalus - Kailua-Kona, HI, USA
Uropterygius macrocephalus - Kailua-Kona, HI, USA
Uropterygius macrocephalus - L'Étang-Salé, RE-PL, RE
Uropterygius macrocephalus - Tecomán, MX-CL, MX
Uropterygius macrocephalus - Anilao, Philippines (Basura)
© l0tte
Fishes · Bony fishes · Moray eel

Largehead Snakemoray

Uropterygius macrocephalus (Bleeker, 1864)
syn. Anarchias knighti, Gymnomuraena macrocephalus, Gymnomuraena nectura, Uropterygius knighti, Uropterygius makatei, Uropterygius necturus +2 more
up to 47 cm1-14 mLeast Concern
757

The head is the point, and it is the reason for the name: broad, heavy, and flattened on top, out of proportion to a body that is otherwise a thin brown rope.

For an animal that makes its living by pushing into gaps, the head is the tool that goes first. It has to be wide enough to hold a working set of jaws and a decent bite, strong enough to shove rubble aside, and flat enough to enter a crack that the body can then follow through. Everything behind it is essentially a means of pushing it forward.

That is a different design from a moray that hunts from a hole. Those animals wait at an entrance and strike outward, and the head is a trap. This one carries the fight to the inside of the reef, into the spaces where small fish and shrimp sleep, and the head is a wedge with teeth.

It lives shallow, in coral rubble in the top ten meters or so, and like the rest of its group it is listed as rare mostly because nobody can find it.

The genus. Uropterygius Rüppell 1838 - uro (tail). ETYFish

The species. Uropterygius macrocephalus (Bleeker 1864) - big-headed from makrós (μακρός). ETYFish

How to recognise it
  • head noticeably large and broad for the body, slightly flattened on top
  • plain brown, sometimes with faint pale speckling
  • round body, fins barely visible
  • up to 47 cm

Why it's threatened

This species has no major threats affecting it on a universal level, however, it may be affected in isolated areas by habitat degradation and loss.

Threat classification from the IUCN Red List.

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Last Update: August 17, 2026