Its a neat effect when the vision gets wavy when the C02 gets too high. I wasn't sure what to do when the sea creature showed up. I died to it twice.
Viewing post in Abyssal Triage jam comments
When the sea creatures shows up you have two choices keep going take the damage and then man the bilge pump while your crew fixes the sub or stop your engines let the creature swim past for no damage but your then battery power will take the hit as you sit there.
Its the sound of your engines that attract them to you.