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  2. Sleep in fish - Wikipedia

    en.wikipedia.org/wiki/Sleep_in_fish

    However, other fish do seem to sleep, especially when purely behavioral criteria are used to define sleep. For example, zebrafish , [ 6 ] tilapia , [ 7 ] tench , [ 8 ] brown bullhead , [ 9 ] and swell shark [ 10 ] become motionless and unresponsive at night (or by day, in the case of the swell shark); Spanish hogfish and blue-headed wrasse can ...

  3. Sleeping fish? From sharks to salmon, guppies to groupers ...

    www.aol.com/news/sleeping-fish-sharks-salmon...

    A large group of yellowfin tuna swimming off the coast of Italy. Like all fish, they sleep, but it's not like human sleep. Giordano Cipriani/The Image Bank via Getty Images Curious Kids is a ...

  4. Sleep in animals - Wikipedia

    en.wikipedia.org/wiki/Sleep_in_animals

    Sleep can follow a physiological or behavioral definition. In the physiological sense, sleep is a state characterized by reversible unconsciousness, special brainwave patterns, sporadic eye movement, loss of muscle tone (possibly with some exceptions; see below regarding the sleep of birds and of aquatic mammals), and a compensatory increase following deprivation of the state, this last known ...

  5. Greenland shark - Wikipedia

    en.wikipedia.org/wiki/Greenland_shark

    Greenland sharks have also been found with remains of moose, polar bear, horse, and reindeer (in one case an entire reindeer body) in their stomachs. [26] [27] [28] The Greenland shark is known to be a scavenger and is attracted by the smell of rotting meat in the water. The sharks have frequently been observed gathering around fishing boats. [26]

  6. List of nocturnal animals - Wikipedia

    en.wikipedia.org/wiki/List_of_nocturnal_animals

    Diurnality, plant or animal behavior characterized by activity during the day and sleeping at night. Cathemeral, a classification of organisms with sporadic and random intervals of activity during the day or night. Matutinal, a classification of organisms that are only or primarily active in the pre-dawn hours or early night.

  7. 40 Facts About Animals That Might Make You Look Like The ...

    www.aol.com/68-fascinating-animal-facts-probably...

    Image credits: an1malpulse #5. Animal campaigners are calling for a ban on the public sale of fireworks after a baby red panda was thought to have died from stress related to the noise.

  8. Want to sleep underwater with the sharks? There's an Airbnb ...

    www.aol.com/news/2016-03-29-want-to-sleep...

    Dive down 10 meters deep and in to the blue when you stay in this Airbnb in the Aquarium de Paris, surrounded by 35 sharks in a 360-degree glass submarine.

  9. Somniosidae - Wikipedia

    en.wikipedia.org/wiki/Somniosidae

    The Somniosidae are a family of sharks in the order Squaliformes, commonly known as sleeper sharks. [1] The common name " sleeper shark " comes from their slow swimming, low activity level, and perceived non-aggressive nature.