What are your opinions on spearfishing?

Answer 1

It depends on the purpose:

Doing it for 'sport', and not eating what you catch is a definite no-no.

Taking 'one for the pot' is OK, so long as the diver obeys local regulations regarding minimum sizes and catch limits etc. (And if there aren't any local regulations, then be sensible and conscientious, learn the target's habits and breeding season, and don't e.g. go out hunting every day during breeding season.)

On that score, the spearfisher should be eating what they catch themselves, and not hunting to sell. That said, if people want to eat fish, then spearfishing is about the most environmentally-sensitive means of obtaining it, as it's totally selective.

I'd rather the seas were full of spearfishers, than industrial factory ships, strip-mining the oceans and seabeds, throwing back half their catch as 'bycatch' and leaving behind hundreds of metres of abandoned/lost fishing gear which continues to entangle not just fish, but cetaceans, turtles, and seabirds for many subsequent years.

Compared to that, the damage spearfishers do (even the irresponsible ones) is minimal.

Answer 2

The injury caused to the fishes is avoidable and conventional method saves ecology !

Answer 3

Cruel.