Barracuda

The Barracuda is a minor antagonist in Finding Nemo.

Finding Nemo
The barracuda is seen in the beginning of the film as it looks at Marlin and Coral. Coral sees her eggs and rushes to protect them. Marlin tries to help Coral, but the barracuda knocks Marlin unconscious and eats Coral and her eggs, except one that later becomes Nemo.

Trivia

 * The barracuda can be heard roaring as it attacks Marlin and Coral. In a similar vein to Glut the Shark from The Little Mermaid, this may have been done merely for dramatic purposes.
 * In real life, barracuda do not eat clownfish (or any other kind of fish) eggs.