"I can't imagine too many are, in whatever form they may be." Humans don't belong down in the deep depths, in much the same way that birds don't. Either they survived and are far away from here... or they aren't, and they've long since contributed their body to the neverending chain of death and life which happens in the water.

Still, she lets Ivan think about his options for a moment, just to give him some time to commit to one or the other if he wishes. When he doesn't, she offers, "I could always use my voice to see if anything is inside." Echolocation is such a handy thing. Sure, she won't be able to fit, but it should be of some use.