While the bee population is going down, numbers of jellyfish are going up. But that’s only good for the jellyfish. Larger populations of jellyfish are damaging fish farms, stinging beach-goers and are a signal of the worsening health of the world’s oceans. According to the National Science Foundation, there are more jellyfish because of warmer waters caused by global warming and because humans have caught too many of the fish that eat jellyfish.