I will second this but there was controversy last year because it was deemed that Tardigarde is a species. I suggest that we go for the Ramazzottius varieornatus which is the most stress-tolerant of the Tardigade species.
I do like the Tardigrade because he is what hardness is all about. There was an issue raised last year where someone pointed out that the Tardigrade is a species not an animal. A particular type of Tardigrade was found (it had a Latin name). I am sure someone will explain further.