Are Harlequin Rasboras fin nippers?

I'm putting them into a 75 gal. tank in place of my 5 inch rosy barbs. They're going in with 4 gouramis, 2 baby angels, a pleco., leporinus, shark, 4 cockatoos, and a catfish. I may later trade something out for a kribensis cichlids too. The leporinus is pretty big, about 7 inches, and shouldn't grow any more, sooo... not to worried about him. He's pretty nice anyway. The shark only flares up everyonce in a while anyway. Hey thanks for everyones help! I can't wait to add these guys, and get rid of my aggressive rosy barbs.
 
I would definitely go with more than six in a 75 if you want to see schooling behavior. Six are just going to get lost in that large of a tank. Others have mentioned 12-16. I'd go with at least that many.
 
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