Oh, I see. Greek batis is a kind of fish or possibly a ray or skate. Nice to know.

I worked at a software company that had a large artifical pond around which its buildings were placed. There were rays in it (it was connected to a slough and to San Francisco Bay). They were beautiful creatures, skating along the surface and dipping the tips of their wings out into the air. A little under a meter across: black on top and white on the bottom. For a couple of months there was also a small seal in the pond. Really the only pleasant memories of that job.