The slender argentine, ''Microstoma microstoma'', is a species of pencil smelt, found around the world in tropical and subtropical areas. This species grows to a length of TL. Its main food includes other fish, and its feces.

References

* * Tony Ayling & Geoffrey Cox, ''Collins Guide to the Sea Fishes of New Zealand'', (William Collins Publishers Ltd, Auckland, New Zealand 1982) Microstomatidae Fish described in 1810 {{Argentiniformes-stub