Description

Also known as Blackline-tail Tetra, Costae Tetra, Schooling Tetra.

Found in large schools, over heavily vegetated margins, of rivers and their tributaries.
They feed on crustaceans, insects, plants, and worms.
Length - 6cm
Depth - ?m
Widespread South America

Popular aquarium fish!
Related to Piranha's.
Piranha's have a fearsome reputation (because of James bond 007) as a voracious predator that can strip flesh off bones in minutes, although they have razor sharp teeth they are in fact quite timid scavengers. Ref: https://www.fishbase.de/summary/Moenkhausia-costae.html