Fish that sleep at night?

Many fish species do indeed sleep at night, even though they don't have eyelids like humans.

Here are some examples of fish that sleep at night:

Pufferfish: Pufferfish are known to bury themselves in the sand during the night and enter a sleep-like state.

Clownfish: Clownfish sleep inside their host sea anemones at night, seeking shelter and protection while they rest.

Angelfish: Angelfish find a suitable spot, often among coral reefs, and settle down to sleep.

Lionfish: Lionfish tuck their fins in and find a sheltered location to rest during the night.

Goldfish: While they may take short naps throughout the day, goldfish primarily sleep at night, often staying still and reducing their activity levels.

Catfish: Catfish species, like Corydoras catfish, often rest on the bottom of their tank or find hiding spots to sleep at night.

Wrasses: Some wrasse species, such as the Bluehead wrasse, may form sleeping aggregations in sheltered areas of the reef during the night.

It's important to note that while fish sleep, their brain activity does not completely shut down, and they remain alert to potential threats or disturbances in their environment.