Jungkook stares out into midair for a few seconds, piecing together what bits he can picture about sting rays, and what else seems to follow with logic. It seems unlikely that the entirety of the tail is a stinger, in part because he's pretty sure he's seen sting ray tails whip around flexibly before, which can't make for a great sting. He's guessing that the flexible nature of the tail also probably helps with the swimming thing. So at the very least, a sting ray with its stinger removed should still be able to swim freely. Also, Jungkook's pretty sure that lots of stingers on other animals break off to make sure the venom fully sinks into the enemy — like bees and stuff.

So maybe a sting ray's stinger breaks off pretty cleanly and without major injury to the animal. That seems pretty ideal.

By the time he reaches his conclusion, Jungkook blinks, realizing that he isn't sure exactly how much time has passed since he zoned out. He glances sheepishly in Yoongi's direction.

"Sorry. Was thinking about stingers."