How do you know if your fish is sleeping?
It’s pretty easy to tell when fish are sleeping: they lie motionless, often at the bottom or near the surface of the water. They are slow to respond to things going on around them, or may not respond at all (see some sleeping catfish here). If you watch their gills, you’ll notice they’re breathing very slowly.
Do fish stay still asleep?
While fish do not sleep in the same way that land mammals sleep, most fish do rest. Research shows that fish may reduce their activity and metabolism while remaining alert to danger. Some fish float in place, some wedge themselves into a secure spot in the mud or coral, and some even locate a suitable nest.
Do fish need full dark sleep?
Fish living in aquariums require 12-16 hours of darkness every day. This is due to the fact they need 8-12 hours of light a day to thrive. Light timers and alarms are the most straightforward and successful approaches to regulating your fish’s night and day cycle.