What type of fish is it it is pink and round with no tail but two fins and are quite aggressive?

Sounds like a blood parrot, one of the most unfortunate fish in the hobby. The 'normal' blood parrot is a hybrid cichlid and is quite aggressive. Its awkward shape means it already has, in my opinion, quality-of-life issues. As if this was not enough, some people have decided that it's highly amusing to tattoo, dye, or cut fins off these fish. The taillessness is not natural - the fish has been deliberately mutilated, somebody has intentionally cut off its tail. This is generally done with a pair of scissors and no anaesthetic. If you do not already own this fish I strongly recommend you do not buy it; the less people support the cruel trade in 'cosmetically enhanced' fish, the better.