Ancistrus temminckii is a species of armoured suckermouth catfish in the family Loricariidae of order Siluriformes.

[1] Males grow to about 10 centimetres (3.9 in) excluding tail.

[1] It is very rarely imported these days, however individuals of the so-called Ancistrus cf.

cirrhosus, a fish of which the origin is unknown, are often sold as A. temminckii.

The difference between the two species is that the A. temminckii has a dark spot at the base of its dorsal fin, between the first and the second ray.