The leedsichthys is the one of the largest sea creatures out there and takes pride in destroying or damaging player created rafts. However the leedsichthys can also be interacted with and used as a fish meat farm as it overtime generates fish meat that can be collected on the outside of its body, therefore making it useful to keep them in a water pen if tribes wish to store fish meat. If a albino leedsichthys is found and killed the player that killed the beast will revive item skins.
My entire life was on my raft. It came out of nowhere. The only reason I made it to shallow water, is because I went in a tight circle around it and it missed one of its attacks. That one extra attack would've destroyed everything and sent me back to square one. Do what I did but better and you will also survive.