Do Tropical Fish In Our Aquariums Sleep?

[quickdodge]

I was just curious. I looked it up online, but all I can seem to get the answer to this is for the bigger fish in the deep sea. What about in our tanks? I have a 55 gallon tank with quite a few fish in it:

3 blue gourami
3 great danios
3 serpai(sp) tetra
2 green tiger barbs
2 bumblebee catfish
1 albino clawed frog
1 chocolate algae eater

Just wondering if these guys sleep. I have came into the living room in the morning (about 5:30am) to find most of all of them motionless. Can someone shed some light on this for me? Thanks. Later, QD.

 

[Dwarfs]

Fish rest at night to conserve energy, but they don't go completely into sleep. Going to sleep would mean getting eaten

 

[quickdodge]

THank you. Later, QD.

 

[Fella]

In total darkness my puffers curl up on the sand. I turned the light on my SAP tank at one 5am to see him curled up asleep on the tank floor, only to wake up and clumsily bump into everything as if drunk.

 

[Qays]

some of my fish rest on plants or just float around / rest on the gravel

 

[reddannyh]

Mine tend to wedge themselves between leaves of plants or rest in the roots.

 

[guppy_man]

my rams rest on the gravel at the same time every day around 11pm, i thought there was something wrong, only to find them swimming around after i turned the light back on

 

[millym]

have a look at your green tigers at lights out - they'll be parked in a corner somewhere pointing slightly nose down...........semi snoozing!