Yoongi smiles, eyes falling shut for a moment, enjoying Jungkook's closeness more than the presence of the shark. "Now who's cute?" he asks quietly, giving Jungkook's arm a gentle squeeze. The shark is so near to them, Yoongi can almost feel the chill of the water, the glass cool where he lifts his hand to press his palm against it.

"It has to be an evolutionary advantage," he decides, thinking back to the picture of the hammerhead. "But I don't see how. Like you said, impractical." It might give them a metaphorical leg up on predators closing in from the sides — but then, what eats a hammerhead shark? It seems to Yoongi like that's the sort of creature that ends up top of the food chain.

Unless its dumb shaped head prevents it from being an effective hunter.