Individual whales are large, but there aren’t that many individuals.

I wonder if populations have fully recovered from the whale-oil era.

LOL

It’s nice to see he separated the sheep and the goats.

Plastic is a species?

I'm not sure what cubic volume vs 2D surfaces means to you, but these comparisons are by mass, not volume. Plus, anaerobic bacteria would only come up on top if you counted all of them as one species, which they are not.

The same argument could be had for fish, since they inhabit the volume of water, instead of the thin land surface of earth.