4 ms·

If they only swam up they would soon run out of sea!

• prewett 16y ago
  :) I was assuming sort of an up-and-sideways kind of up, and maybe they sink down when they hit the top and go up-and-sideways again. Jellyfish just don't seem like the right-angles-to-the-surface sort of swimmers to me, but like I say, I have no experience with jellyfish, not even seeing them on nature shows.
  • zacharycohn 16y ago
    As someone who has swam through jellyfish, they totally swim sideways.
• niels_olson 16y ago
  which is usually exactly what they do. Go to Boston Harbor in the summer.