LOL, blue rainbowfish.
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1) South American freshwater ray but not the small type that live in aquariums. The big mean bugga
2) some sort of shovelnose catfish. We don't get stuff like that here so no idea really.
3) flagtail prochilodus and a pr of Cichlasoma synspillum or something breeding in the back.
4) some sort of Geophagus type cichlid, looks rather tasty
5) assorted cichlids that would go well on the fry pan
6) Geophagus brasiliensis
7) Lamprologus brichardi and leilupi (however you spell it
8) looks like a 5 bar Cyphotilapia frontosa but I thought they only came in 6 and 7 bar? and a Julidochromis dickfeldi
9) Blue rainbowfish (Melanotaenia lacustris)
10) red rainbowfish are probably Glossolepis incisus but could be Glossolepis pseudoincisus, depending on how big they are. And a clown loach.
11) can't really tell but gonna guess and say pirahna (pronounced pee-run-ya).