Top 12 Animals That Don’t Have a Brain

Man-O-War:While we refer to the creature in the singular, we should actually say “man-o-wars.” You see, the animal is actually a colony of polyps, also referred to as zooids.

Oysters: filter water and remove organic particles — like plankton — to eat them. They can filter up to 50 gallons of water per day, giving them enough food to last a while.

 Sea Squirts:is both male and female. As a hermaphrodite, it has both sexual reproductive organs — the creature does not need a mate to have children.

Clams: are bivalves, which is a mollusk with compressed bodies inside of a pair of hinged shells. Others in the family include oysters, mussels, clams, and scallops. 

Jellyfish:use this ability to propel themselves toward prey, such as plankton, in oceans throughout the world. Their ability to move also comes in handy when they need to avoid predators.

Sea Sponges:It’s the water that moves them around and makes them look like they’re dancing. Their survival centers around filtering detritus from the ocean. They have no brains, organs, neurons.

Sea Urchins:are pointy, spiky animals, and any beachcomber in their bare feet might discover this in the worst way. Fortunately, outside of South Florida, sea urchins are not poisonous.

Sea Anemones: is yet another animal that has a plant-like appearance. However, the sea anemone is very much alive and seeking food, which it uses its long tentacles to catch and eat.

Sea Lillies:resemble plants with feathery limbs. They sit immobile at the bottom of the ocean for their entire lives. There’s also research that shows the sea lily is capable of floating .

Corals:are part of the Cnidarians family. Their bodies are asymmetric and they both sting their enemies. Categorized as plants, coral is actually a living animal without a brain.

Starfish: is a cousin of the sea urchin. But — wait for it! — it’s not a fish. The truth is this species can’t swim. Starfish spend all their time at the bottom of the ocean.

Sea Cucumbers:There are more than a thousand types of sea cucumbers. Many of the species live in deep water. They can swim up to 3,300 feet, floating back to the bottom of the ocean floor.

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