If your raft gets hit once, stop it right away. 50% chance it won't hit it a second time and you might just save your raft, simply wait for it to go away then sail to shallow waters asap. You cannot outrun it with a raft and our only takes 2 strikes to sink a full health raft.
Imagine this: leedsichthys tameable and rideable. They can harvest metal and oil. They had a platform saddle. They could swallow fish hole and carry them around alive. WELL THEY ARENT TAMABLE! They would be op as a tame.
General tip works great get an Ichysauros and swim down to one hop off quick and you can “scrape it’s meat” it won’t become aggressive as long as you get back on fast but it gives you loads of raw prime fish meat and you can do it every 10 min