I feel like fish should turned off because they make having ocean bases nearly impossible to keep under 100 entities. Maybe like the old maps where squid were disabled. We could have a villager that sells buckets of fish in spawn or a roulette that uses credits that gives you a random fish in a bucket to compensate.
I just went from 78 entities to 400 in a matter of seconds just from fish and there's not much I could do about it sadly.