> the only animal on the planet that do this or that

And here comes the "sexy phrase" attack.

Ehhhm... Sorry, but not. There are lots of species that do this.

> the only animal

Besides us, that is.

I believe that that sentence could be written from the point of view of the anemone. The situation is unique in that the species of anemone itself may not exist outside of the "captivity" of this species of crab. I could be wrong, but all farm animals and pets are still related to some species of animal outside of human captivity. The closest analog of which I can think is the avocado plant whose seeds, as far as we know, can only be spread via human intervention.

I designate myself and my other fellows as humans.

You can designate yourself as you wish, it doesn't make you/us less of an animal

What is the proper word for "animals minus humans"?

You wrote the first HN comment that made me sad I only can upvote it once.

Humans are animals, even if they're not particularly good at it.

It's hard to say the worldwide apex predator isn't good at it

"worldwide apex predator" == "good at it (being animals)" ?

Not everything I say is literally true. I realize this may come as a shock to my many fans.

More like apex parasite :(

Extended Phenotype territory.