Not really aggressive ime, mine has fought with my ery sp Peru in the past, and he won't back down now even though he's half the ery size now. It didn't start anything, but it defended its hide. It share with the bichirs, I think the wolf tried kicking it out but can't be sure. And they will eat fish that fit in their mouth, but that's any catfish. Keep it with similar sized fish and you'll be fine. And largest I've seen of is around 6" in captivity though I've read they're supposed to get up to 8-9". Growth rate is slow. Not a picky eater ime. Mine is eating carnivore pellets, shrimp pellets, and trout worms at about 3-4". Mine seems to be more outgoing than most as in the morning, even with the light on, he's is swimming back and forth and up and down nonstop. I could never get the video to post so I will take screenshots of it to share and I will share a regular picture as well. Btw, if the one pictured is the one in stock, you better hurry and get it, I know I would not only is it already large which is common, it has the (what I believe to be) adult pattern. It is a gorgeous specimen that one.Are they aggressive? Do they eat fish that can fit in their mouth? What's max size in captivity?