I think it would be cool if there were multiple kinds of sharks, not sure if suggested before but some are stronger/more agressive according to how they are in the real world ocean
from what i've looked up in the last couple minutes this is the "top 5 most agressive/dangerous to human" sharks:
- Great White Shark
- Tiger Shark. ...
- Shortfin Mako. ...
- Oceanic Whitetip Shark. ...
- Bull Shark.
I think it would be cool if each of them had different traits and strengths so if you got for say a great white which is the supposed strongest it would break your raft faster so you have to act with a sense of urgency and would add some immersion to the game.