Prehistoricraft: Sea Creatures Add-on 1.19/1.18+

There aren't many sea creatures in Minecraft. You always want something more, because survival is getting easier and easier every day. So with the mod Prehistoricraft: Sea Creatures the seas and oceans will become the most dangerous place: prehistoric monsters will live there. New fish species will be extremely aggressive and incredibly dangerous.

Types
Stenopterygium
Ophthalmosaurus
Malavania
Kihitsuka
Mosasaurus
Thylosaurus
Helicoprion
Styxosaurus
Kaiveca
Shastasaurus
Cymbospondylus
Mixosaurus
Conctopalatus
Edestus
Trinacromerum
Barionix
Ankylorhiza