Instead of a more stock roar, she instead emits an absolutely soul-crushing screech.
While it's a more humorous scene, it doesn't change the fact that if it weren't for him clinging on for dear life, Marlin would be dead.
She is scary enough to look at with all those teeth, but she's also a particularly aggressive hunter, especially after Marlin.And she doesn't make a sound until the camera angle changes. As Dory and Marlin play around with it, what descends to meet them are some long, razor-sharp teeth, and two big, blank-white, bug-like eyes. But when Dory tries to touch it, it jerks away and slowly starts ascending. We don't even know what's lurking in the pitch black for several seconds other than a small, unidentified, hypnotic light (though literally anyone who knows what an anglerfish is will recognize the situation as soon as they see the disembodied light and be practically begging the two to get the fuck out of there). While a large portion of the eggs may have been taken unintentionally when the Barracuda ate Coral, the rest of the eggs would have been eaten by opportunists who waited for the Barracuda to leave before they moved in to eat the eggs considering that we saw Marlin being knocked out for a long time. Considering that real life barracuda don't eat fish eggs is meaning the Barracuda likely only intended to eat Marlin's wife Coral.The roars it utters as it hunts them as well.There's a shot during Marlin's brief tussle with the natural abomination where it gnaws at him.