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Dragonflies (Anisoptera)
Some species of dragonfly have more than 28,000 lenses per compound eye, a greater number than any other living creature. And with eyes covering almost their entire head, they have nearly 360-degree vision too.
Chitons may lack a brain, head and eyes in the classic sense, but nestled in the shell of this primitive marine mollusc are hundreds of tiny 'eyes', complete with lenses that focus light to create images.
Some flatworms have more than 100 eyes. - Amazing Animal Facts | Facebook.
Invertebrates often have more than two eyes. Most spiders, for example, have eight eyes that help them spot and hunt prey. A group of marine molluscs called chitons do even better – they have hundreds of eyes dotted all over the armoured plates that cover their bodies.
The mantis shrimp's visual system is unique in the animal kingdom. Mantis shrimps, scientifically known as stomatopods, have compound eyes, a bit like a bee or a fly, made up of 10,000 small photoreceptive units.
Monarch butterflies also known as the king of butterflies possess 12000 eyes, which helps them to see in all directions. These butterflies possess two kinds of eyes, that is, compound and simple.
Leech: The interior structure of a leech is divided into 32 different segments, each of which has its own brain.
Ocean creatures are known for their weird eyes, but scallops have one of the weirdest visual systems of all. These marine bivalves (above) have up to 200 eyes, and each of them uses a mirror instead of a lens to focus light.
Did anyone know that some animals have blue blood, especially when it is exposed to oxygen? Can you guess what animals might have blue blood? Lobsters, crabs, pillbugs, shrimp, octopus, crayfish, scallops, barnacles, snails, small worms (except earthworms), clams, squid, slugs, mussels, horseshoe crabs, most spiders.
Interestingly enough, in our versatile animal kingdom, there are multiple animals that are born blind. One of them is the eyeless shrimp, which only has light perception. Another one is the star-nosed mole, the fastest-eating mammal in the world, who uses touch as their main sensory organ.
Hydra is a genus of freshwater Cnidarians and is a freshwater mammal, not a plant. It has tentacles like its saltwater counterparts. Hydra features a tubular body, a “head,” and a “foot.” However, it lacks eyes, a brain, and muscles.
“There is one species that has only one eye naturally and they are from a genus called copepods.” Unlike the mythical one-eyed giant Cyclops, these real-world creatures are pretty small. In fact, some copepods are even smaller than a grain of rice.
Fun Facts. The sperm whale has the biggest brain of any animal species, weighing up to 20 pounds (7 to 9 kilograms). Larger brains don't necessarily make a smarter mammal. But as mammals evolved, many groups, from Primates to Carnivora, have shown independent increases in brain size.
You surely know that humans and giraffes have just one heart, as most animals do—but not all. Octopuses and squids (animals called cephalopods) have three hearts.
A giant squid captures its prey by using its two long feeding tentacles to grab an unsuspecting victim and bring it toward its arms. Then the squid chomps down on its prey with its strong beak. Since squid live in the dark deep ocean, they have no eyes at all.
Watch a kangaroo in the Australian outback, and you'll notice something strange—when they walk, they have five "legs." As they graze on grasses and shrubs, they place their tails on the ground in time with their front legs, forming a tripodlike arrangement that supports their body while they bring their hind legs ...
Another clam, known as the disco clam (Ctenoides ales), has about 40 eyes. But its vision is poor; it couldn't even detect flashing reflected from a nearby disco clam, according to research covered by Live Science.
Snails have more teeth than any animal.
This is TRUE. A snail's mouth is no larger than the head of a pin, but can have over 25,000 teeth (but these aren't like regular teeth, they are on its tongue).
Family Channichthyidae has fishes that do not contain hemoglobin pigment in their blood. Hence their blood is white. As Hemoglobin is important for carrying oxygen in the body, but in the habitat of these fishes, the amount of oxygen present in cold water makes them devoid of Hemoglobin.
Sea cucumbers have yellow blood due to a high concentration of a yellow vanadium-based pigment called vanabin. Some members of the phylum Annelida (segmented worms and leeches) have a greenish respiratory pigment called chlorocruorin.
Mysterious creature with 24 eyes discovered turns out to be highly-venomous jellyfish. A new venomous species complete with 24 eyes has been found in a muddy pond. The new species of jellyfish was discovered by scientists from Hong Kong Baptist University (HKBU) at Mai Po Reserve in Hong Kong.
In addition to its transparent and colorless body, Tripedalia maipoensis has 24 eyes like other box jellyfish -- equally divided into four groups. Researchers believe two eyes in each group have lenses that enable image-forming, while the other four can only sense light.
While having more than two eyes is not unusual in the animal kingdom, having specifically five-eyes, and in this arrangement is. To the best of the author's knowledge, Kylinxia and Opabinia are the only two animals in the fossil record that currently share this anatomy.