Stuff You Should Know SYSK Selects: Jellyfish - Even Cooler Than Octopi?
Jan 11, 2020
Dive into the fascinating world of jellyfish, known for their incredible adaptability and unique life cycle. Discover how these creatures can revert to their juvenile stage and reproduce en masse! The playful banter about morning struggles and culinary quirks adds a humorous touch. Explore the showdown between jellyfish and comb jellies, highlighting their unusual anatomies and ecological roles. Learn about their bizarre feeding mechanics and the dangers posed by certain species, painting a vivid picture of these ancient mariners.
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Jellyfish vs. Comb Jellies
- Jellyfish and comb jellies appear similar but may not be closely related.
- Genetic taxonomy reveals differences between nadaria (jellyfish) and tenophora (comb jellies).
Jellyfish and Comb Jellies Body Structure
- Jellyfish and comb jellies share similar body structures, including epidermis, gastrodermis, and mesoglea.
- The mesoglea, the jelly-like substance, comprises 95% of their bodies, which are mostly seawater.
Jellyfish Nervous System and Eyes
- Jellyfish have a nerve net, a basic nervous system, with specialized cells for detecting light and orientation.
- Some jellyfish, like box jellies, have eyes with retinas and lenses but no brain, raising questions about image processing.