What are Horseshoe Crabs?

” Horseshoe crabs are marine arthropods of the family Limulidae and order Xiphosura or Xiphosurida. They are invertebrates, meaning that they lack a spine. Horseshoe crabs live primarily in and around shallow ocean waters on soft sandy or muddy bottoms. They occasionally come onto shore to mate. They are commonly used as bait and in fertilizer. In recent years, population declines have occurred as a consequence of coastal habitat destruction in Japan and overharvesting along the east coast of North America. Tetrodotoxin may be present in the role of species inhabiting the waters of Thailand.

Because of their origin 450 million years ago, horseshoe crabs are considered living fossils. The entire body of the horseshoe crab is protected by a hard carapace. It has two compound lateral eyes, each composed of about 1,000 ommatidia, plus a pair of median eyes that are able to detect both visible light and ultraviolet light, a single endoparietal eye, and a pair of rudimentary lateral eyes on the top. The latter become functional just before the embryo hatches. Also, a pair of ventral eyes is located near the mouth, as well as a cluster of photoreceptors on the telson. The horseshoe crab has five additional eyes on top of its shell. Despite having relatively poor eyesight, the animals have the largest rods and cones of any known animal, about 100 times the size of humans’, and their eyes are a million times more sensitive to light at night than during the day. The mouth is located in the center of the legs, whose bases are referred to as gnathobases and have the same function as jaws and help grind up food. The horseshoe crab has five pairs of legs for walking, swimming, and moving food into the mouth, each with a claw at the tip, except for the last pair.” https://en.wikipedia.org/wiki/Horseshoe_crab

What are the strangest things about an Octopus?

“Octopus is the largest genus of octopuses, comprising more than 100 species. These species are widespread throughout the world’s oceans. Many species formerly placed in the genus Octopus are now assigned to other genera within the family Octopodidae.” https://es.wikipedia.org/wiki/Octopus

  • There are around 300 species recognized.
  • These interesting creatures have 3 hearts, two pump blood to the gill and the other one to the body.
  • They are considered fast swimmers and can expel water through their mantles and can fit almost in any place because they have no bones nor skeleton.
  • Have special jaws that can give a very nasty bite, even venomous saliva but this is mainly when hunting.
  • Their skin is capable of turning itself in the environment or object where it is laying.
  • In case of losing any part of the body like an arm, it can grow that part again.
  • They are very intelligent creatures that can learn even form others octopus.


12 Animals With The Weirdest Teeth

These animals will make you think twice about saying I’ve seen everyting there is to see about nature shows… o no… no no no sir! From majestic narwhals and their 8.5 foot tooth to terrifyingly cute penguins with scary mouths, here are 12 Animals With the Weirdest Teeth.

The Babirusa
Just like the narwhal that we just discussed, this creature’s tusks are actually its teeth that have managed to grow in the opposite direction and pierce the roof of their mouth. More specifically, its the upper canines that do the piercing while the lower ones grow sideways out of their mouths. The males use this bizarre evolutionary trait to their advantage when they fight other males during mating season and slash into each other’s flesh. The unfortunate part is that the babirusa has to file down it’s teeth, otherwise, they’ll end up growing right into its skull and proving to be fatal.

The Frilled Shark
Thank god this living nightmare lives in some pretty deep waters because you wouldn’t want to end up swimming near one of these things. Case and point, look at its needle-like teeth! It’s got rows upon rows of teeth that are in their own rows. This makes it harder for their prey to try and escape as they get trapped and have their flesh torn. These sharks mostly feed on different species of cephalopods such as squids and they use their extremely flexible jaws that are long enough to swallow prey that’s larger than them whole. Truly scary.

The Lamprey
Out of the 38 species of lamprey that are known to exist, which seems like too many of these scary aliens, only 18 of them are known for being parasitic. These fish use the many rows of teeth that fill its mouth to cling onto their desired prey of choice and chomp onto a piece of tasty flesh from an unsuspecting source. Once the animal is latched on tightly, then they begin to use their tongue in order to lap up the nutrient-rich blood from its victim. Yeah, these things are basically underwater vampires. Avoid them at all costs.

The Hagfish
This animal is a type of marine fish that resembles more of a fish and is known for producing an insane amount of slime that it uses to suffocate the hungry predators that try to go after it. It’s perhaps less known for its smile that comes with two pairs of sharp teeth on each side. The hagfish is one of those animals such as the previously mentioned lamprey that is completely jawless. These animals don’t even need their teeth as they’re able to get the nutrients they require through their skin but they also feed on dying prey by eating them from the inside.

The Penguin
Thanks to films such as “Happy Feet” and “March of the Penguins,” the general public sees penguins as cute balls of fluff that live in the cold Arctic region. It turns out that the inside of a penguin’s mouth is very much the exact opposite of cute fluff ballness. Their mouths are entirely lined up with razor sharp teeth that are essential in helping a penguin feed. Since penguins eat their food alive and whole, their sharp teeth help keep down squirming fish and keep things moving smoothly. And yes, the following image that you see is real.

The Leatherback Sea Turtle
Sea turtles have quite the reputation for being such adorable and majestic creatures of the ocean but that’s because most people haven’t had the chance to look at their insides. The most frightening of these turtles happens to be the leatherback sea turtle. The inside of their mouths looks like a small forest of spines as pictured below in the following image. These aren’t technically teeth, as they’re rather called papillae, but they act just like teeth. The cartilaginous spikes help keep jellyfish moving down the turtle’s throat as they’re being swallowed and protects them from the jellyfish stings.
Before we reveal number one, let us know in the comments below which one of these animals you thought had the weirdest set of teeth and don’t forget to subscribe. And now…

The Crabeater Seal
As far as teeth go in the animal kingdom, there’s an exact reason on why we chose this animal as the number one spot. Just look at that unique pattern of teeth! It’s like nothing you’ve ever seen before. So why do these seals have such odd-looking chompers? Well, despite their name being crabeater seals, their diet is actually made up of 90 percent Antarctic krill and don’t actually feast on crabs because they live in such deep waters. The weird pattern of their teeth helps filter out the excess water when they take a bite and only the tasty krill is left.