SO um i put in some neon tetras and scissortail rasboras in there before I knew pink convicts were extremely aggressive they have had no history of eating them except the smallest slowest of the neon tetras, and the sick neon. I woke up to see that my smallest neon was GONE! I thought it was caught in the filter but i turned the filter off and no neon! I suppose it got eaten. I am shocked. But they don't seem to be EXTREMELY aggressive as what I saw in the profile. This is what someone said in a comment"These fish are the most aggressive fish I have ever had. (And I have been in the hobby for about 20 years now!!!) They mix well with oscars, Jacks,plecos, pictus cats, and sometimes firemouths. You must be very careful when selecting tank mates. Kribensis and convicts in my experience are very aggressive towards each other. My Male convict is 7 inches and the female about 4 or 5 inches. They hold there own, and will defend there broods (fry), against ANYTHING ELSE IN THE TANK!!!! I have four 13 inch oscars in my 220 gallon tank and two huge 15 inch plecos And a huge batch of kribensis. And the convicts when defending their fry will attack my 13 inch oscars when getting to close and win the fight!!! A truly amazing fish that is basically a true hand full./ I bought two small convicts a while back and had them with my oscars and the convicts where breeding already at like only 2 inches and one of my oscars got to close and the little 2 inch convict went up against my 13 inch oscar and the oscar got annoyed and swallowed the convict whole!!! It was pretty funny. So I had to raise the convicts I currently have in the 220 in a 75 gallon tank to get them big enough to go in with the massive oscars. All in all a great fish just make sure to give them lots of space, good filtration, good food, and good tank mates. Never put convicts in a community tank, I don't care if its 10000 gallons, the convicts will kill the other fish in the community tank. " I made a big mistake putting neons,scissortails,mollies,glolight tetras, and zebra danios in there didn't I?