I'm not sure if I am understanding your question correctly, but if I understand correctly I believe the barracuda in Finding Nemo was the fish which killed Marlin's wife, Coral, and the eggs at the beginning of the movie. I hope that answers your question.
This is not defined in the movie
They were eaten by the barracuda
She got eaten by a barracuda with her eggs.
The fish that attacks Marlin and Coral at the beginning of Finding Nemo is an Australian barracuda
A Barracuda
A barracuda ate the guppies in Finding Nemo.
This is not defined in the movie
They were eaten by the barracuda
She got eaten by a barracuda with her eggs.
Eaten by the barracuda
The fish that attacks Marlin and Coral at the beginning of Finding Nemo is an Australian barracuda
A Barracuda
Nemo's mom Coral is eaten by the barracuda at the beginning of the movie
nemo and marlin live in the great barrier reef A barracuda likes to feed on fish eggs and fish.
a barracudda
Bruce, a Great White shark.(named for the mechanical shark used in Jaws)
Marvin's wife Coral is eaten by an Australian barracuda