Blackline-tail tetra

Blackline-tail tetra... Moenkhausia costae

I mean, how clumsy is that common name? May as well call Neons 'half red stripe tetra'.

All the marketing minds in the aquarium trade, and no-one came up with Tick Tetra? I might start my own campaign. See if I can go viral.

Anyway... These seem to be failry new in the hobby. Pretty sure I saw them about 8 years ago for about £12 each, so the sanity elves have crept in here, at least. They are a lovely fish, I don't know much about them but a well known aquatic chain has them listed as up to 2.5 inches maximum. 

They seem peacefull, although I've only kept them with platies so far, there's no nips or anything on the platy fins so that's a good sign.

As with all tetras, I'd buy 10+ to get their shoaling behaviour on display.