How to make SWIMMING DINOSAURS in JWE 2! (sort of)

I'm still messing around with lagoons, expect to see more lagoon videos soon!
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Mods used:
Camera torchlight:
www.nexusmods....
Expanded speed controls:
www.nexusmods....
Freebuild:
www.nexusmods....
Expanded sandbox:
www.nexusmods....
Expanded terrain tools:
www.nexusmods....