What is that fish called that sucks everything it sees?

I went to a river and there we would fill up a baby bottle, and we would put it near the water and all of these fishes would jump up and fight over the bottle and would try to suck it. If you put your finger in the water they would begin to suck it. Dare not to fall into the water as the fish would all jump on... show more I went to a river and there we would fill up a baby bottle, and we would put it near the water and all of these fishes would jump up and fight over the bottle and would try to suck it.

If you put your finger in the water they would begin to suck it. Dare not to fall into the water as the fish would all jump on you and suck you to death.

What are these fishes called?
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