The longspine bellowfish (Notopogon xenosoma) is a species of fish of the family Centriscidae.

It is found in the subtropical belt of the Southern hemisphere, from South Africa to the St. Paul and Amsterdam Islands to New Zealand.

[1] Its range extends North as far as Madagascar and New Caledonia.

It can grow to lengths of 18 cm.

This Syngnathiformes-related article is a stub.