I think we have to accept that at least half of 'released' school tuna don't make it more than a few hours. We prob'ly got a dozen or two shorts yesterday, all on heavy gear, and at least a half of those looked hopeless boatside. None of those fish came out of the water, all were caught on 30# strike drags, released within seconds, and still more than a few sank tail-first.
If you fish for SBFT or any other small tuna, you need to accept a 50%+ release mortality. Nothing wrong with that per se - it certainly doesn't bother me, although I will move away from small fish if they're all over.
Is there something somehow unethical over killing a dozen SBFT in the course of a day's outing as long as one is fishing by NMFS rules?