Do fish sleep? This question often arises from curiosity ... Fish require minimal light to sleep effectively. Bright aquarium lights can disrupt their circadian rhythms, leading to sleep deprivation.

Betta, or Siamese fighting, fish are among "the most popular freshwater aquarium fish in the world ... Like other fish, betta fish do "sleep." But fish do not sleep in the same way mammals ...

We developed a natural sleep restriction method for zebra fish larvae: swimming against flowing water. Using the water flow method, we sleep deprived the larvae, and measured their reactivity for ...