Many fish owners have tapped on their aquarium and hoped little Bubbles was merely taking a nap inside the tiny castle.
It can be difficult to determine whether a fish is sleeping, and even scientists have struggled to understand the sleep process of fish in the past.
In recent years, technology has made it possible for researchers to scan fish brains and learn how they snooze.
Do Fish Sleep?
“Fish sleep, but not the same as humans or mammals,” says Jared Guthridge, the aquarium curator at the Alaska Sealife Center (ASLC) in Seward.
