robbieb

The black piranha (Serrasalmus rhombeus) is big and needs to be kept alone in the aquarium. Has anyone ever had one? I'm curious about their personality. Do they get easily stressed? Do they hide most of the time?

Abitua89

yeah i got one n they do hide alot

Allie

We had a 14" blue diamond rhom for awhile in our 120g, and a few other Serrasalmus species. They are sketchy. All piranha are....we also had a10" rhom who would come at you thru the glass in 2 seconds. There is the odd piranha who actually isn't so passive.
I fyo have a timid one, have some plant for him to hide behind.