I got my Maculipinnis off the late Nick G who imported 5, and I had 3. (1 died, 1 is still mine and the other a friend has)
Super rare, I really want more to attempt breeding but no-one can get hold of them. I'm pretty sure mine must be largest in captivity, or that i've seen broadcasted anyway.
I love my Piraya, yeah love the jaw he has. His head is massive compared to his body Can't wait for him to start growing more. I wanted a smaller one to grow on, but saw this one advertised and had to get him. Got a spot of HITH but he'll be ok
Oh and the Maculipinnis is in a 240L tank, roughly 3.5ft x 16" x 18" or something, Rio 240.
I'm not a big fan of P's, but yours could definitely change my mind. Especially that Maculipinnis which is just wicked looking, I love the spotting on him and that treacherous looking jaw. Definitely a awesome collection!