Don't encounter it. If you do, swim like micheal phelps!!! Its nothing but a ball of hate and death. If you see them in the vacinity of anything your farming, keep ur head on a swivel, dont get tunnel vision. They have a way of sneaking up from behind and always in groups. If they catch you...death is guaranteed.
Use the ichthy they said... it's immune to shocks they said... that's fine I'll quickly swim done with no scuba gear and lure one to the surface...zap... surface is so near yet so far... manta finish the job