A Shin Godzilla juvenile?? Actually it's the longfin eel, a large eel living in New Zealand! Aggressive, and they swarm prey bigger than themselves. They're even said to be able to kill adult humans.

A video posted by @jamafra1243 on X (formerly Twitter) (April 6, 2024 ・ その他 ・ 0:15). Watch and download it on XCLYP.