What an Ocearch tag does to a Great White

Dead Great White washed up in Durban, with Ocearch tag certainly not looking pretty. Was this the cause of its death, ie infection from botched experiment/installation?

The research/tracking they are doing is very valuable to the understanding of Great Whites, but is there not a more humane way to do it? And perhaps without the chum/alien abduction techniques?

And some more…