This is really awkward and feels almost more like a preemptive scolding in case they let their appetite get the better of them (which they have no reason to, they can eat all the fish they want on the clock, not to mention the ferocious things in the woods, they have so many options they could turn to first) than an admonishment for their aversion to big spiders. They tell themselves there's no way Tarantulas could have found out about that. Nimona's probably put the pieces together by now and some of their coworkers from the fishing boat might suspect something, but the only one they actually said anything to was Dahlia, and as far as Purple knows none of them really hang out with him that much.

At piggyback-ride range, he might still notice the way Purple's shoulders tense up as Tarantulas goes over the subject of people-eating and why it's a bad idea. More defensively than when they were just talking about spiders. "I didn't say you would actually do it. But you see why I'd be nervous, right?"

Oh good, something they can talk about that isn't related to anyone's chances of eating their neighbors. "Not a species I've run into in my universe, no. Do you all turn into different things?" They pause. "Twelve million? I think my species was still figuring out walking upright twelve million years ago."