Fish generally go into an energy saving mode of "rest" but do not "sleep" in the same way land animals do.
Since they do not have eyelids, they sleep with their eyes open.
Sleep can be defined in birds and mammals by eye closure and typical electrical
patterns in the neocortex, but fish lack eyelids and a neocortex. Yet this oscar is ...
Mar 9, 2014 ... The short answer is yes; most fish do sleep. ... Researchers monitored the sleep
patterns of normal Zebrafish and those that lacked a functional ...
Mar 4, 2008 ... They don't have eyelids to close, they sometimes do it during the day, they don't
show the characteristic brainwave patterns like REM sleep ...
Apr 23, 2014 ... Think about your sleep habits and how they might appear to a fish. You might
think it's weird how fish sleep, so what do you believe fish would ...
Scientists have also measured their brainwaves and do not find visible sleep
patterns. But, some fish do noticibly slow down, or stop their ...
www.howfishbehave.ca/pdf/sleep in fishes.pdf
Fish, however, lack the complex brain structures from where these patterns
originate. Another criterion to define sleep, used mainly in the field or in situations
The answer to the question “do goldfish sleep?” is one of the most common
things new goldfish keepers want to know about their fish.
Jun 15, 2015 ... It is believed that fish sleep, although it is a controversial subject; some ... One of
the favorite habits of the clown loach, which has alarmed most ...
Do Fish Sleep? Fish do sleep. Most fish don't have "eyelids". If the aquarium
lights are left on for twenty-four hours a day, the fish will not sleep. They will