I laughed my socks off when they found a length of "old " fishing net washed up then untangled it and set it in the water overnight and actually caught a decent fish in the shallows. But, the fish had allegedly been " too long in the net " and had gone off ! frankly I have never heard of fish...
Ah, but as it is a TV show, there has to be falling outs/and hissy fits and strops, the producers wouldn't have a show if everyone just got on with things like fishing and gathering coconuts etc.
Just a couple of points while you have been away, 1, there are 4 people in the group who have previous experience of "survival " skills. 2, the "well " on the island was topped up with abundant water pre shoot. 3, Two Caymans were " introduced " to the island rather than them actually living...