Warmer waters generally have lower plankton biomass and abundance, and consist of species with smaller body sizes. Jellyfish, my favorite type of zooplankton, are among the biggest plankton.

I’m not going to even attempt to discern why Netflix stakes claim to SpongeBob SquarePants spinoff movies like this new one, Plankton: The Movie, or last year’s Saving Bikini Bottom ...

which could have big ripple effects for the higher levels of the food web. Warming water because of climate change can have the same effects. Plankton are also threatened by microplastics ...