* Bioluminescence: Many jellyfish species have the ability to produce light through bioluminescence. This trait is inherited from their ancestors and is controlled by specific genes. The light is produced by a chemical reaction that involves a protein called luciferase and a molecule called luciferin. When luciferase comes into contact with luciferin in the presence of oxygen, it catalyzes the oxidation of luciferin, releasing energy in the form of light. Bioluminescence is used by jellyfish for various purposes, such as communication, attracting prey, and deterring predators.
Learned trait:
* Associative learning: Jellyfish have been shown to be capable of associative learning, which is a form of learning that involves associating two different stimuli. For example, if a jellyfish is exposed to a light stimulus and then immediately receives a food reward, it will eventually learn to associate the light stimulus with the reward. This learning ability helps jellyfish adapt to their environment and locate food more efficiently.