I was fond of Mo'Creatures sharks. They drop sharks teeth which can be used to craft chain mail. Make the sharks sufficiently aggressive, poweful and/or rare and you can establish the proper balance. Maybe if you kill a squid near a shark they will attack you (mistaking the squid's blood/ink for your's) otherwise they are passive. That would make collecting ink sacs more interesting.
My Avatar is a Dalek, therefor your argument is... EXTERMINATED!!!
You know who can tell me something I already know? Me. All the time. I'm really good at telling me stuff I already know. I don't need help in that department. I don't know about others, but I can't imagine I'm alone here.
Of the top ten search results for "sharks" this is the only unlocked thread that isn't also about a mod or some other much more complex idea involving sharks. Although the original poster did not provide much detail, I don't think that this prevents this thread from being useful. I've provided some more detail. I don't see the necessity of providing parameter specifics for all ideas. This is a forum where ideas are presented and discussed. Why not let various proposals take shape from even if the original commen is as simple as this one. It was enough for me to go with.
I happen to be a software developer who works on a "small" utility for a major software company. I get to field defects and enhancements as well as implement them in code and test them. So I understand the process of communication from user to final product. Not all users are as knowledgeable about all the guidelines (not rules) for posting here, nor should they have to be. As long as they are sincere. And if the idea goes nowhere then the thread will rapidly drop to the next page.
As far as I can tell this is the main active thread for anyone searching this forum on the topic of adding sharks.
Please be more detailed with your suggestions and use the search feature to check if your idea has been previously suggested and recently discussed. This forum doesn't appreciate nor allow vague, redundant threads.