1) Currently, you can click a shark to attack them. But only with a ranged weapon, or when they are attacking your raft.
2) Your survivors when making babies when there is a lot of food and they are healthy. We intend to add a more specific way to make babies like a social system.
3) 100+ sharks are insane. We'll check if it's a glitch or something.
4) Wall can protect your raft(It will last longer). Spike wall can provide protection and also deal damage to attacking sharks.