Squid and fish teething like humans

In the natural world there are some creatures that possess strange teeth. Most notably a popular North American fish and a deep-sea squid species that develop human-like teeth.

Some skeptics may think that the photo of the Promacthoteuthis sulcus squid is a photoshop product when they see in their mouth a human teeth. However, this is purely real, and two "human teeth" are actually lips with folds of this species. Like many head-legged animals, Promacthoteuthis sulcus has spines but is covered by lips. Because the lips have unique folds, they create the feeling that this squid also develops teeth like humans.

The fish named Sheepshead is very popular in North America and is a catch target for many fishermen. However, few people realize the strangeness of their teeth. In addition to possessing human-like teeth, Sheepshead fish also developed a row of teeth on the palate. Because the teeth are relatively blunt, this fish often uses them primarily for the separation of shells of oysters and oysters - their favorite foods.

The record for the sharpest teeth on Earth belongs to a prehistoric insect that once existed on our planet 200 million years ago and is extinct a long time ago. With a body length of only 5cm and no jaw, this creature chopped up their food with teeth thinner than human hair.

In addition to the sharp teeth that normally develop as in other fish, the arowanas live in the deep sea also grow more teeth on the tongue. Despite the terrible appearance, these creatures are only 15cm tall, so it is not really dangerous. Moreover, they reside in deep waters so they never attack people. According to biologists, arowanas live in the dark and almost blind. They must use alternative means to search for food and survival in an abandoned environment.

Megalodon's prehistoric shark is considered by many paleontologists to be the scariest animal of all time. In addition to a body length of up to 20 meters, they possess teeth that are more than 15cm long and throughout life, then fall and regrow a total of 20,000 teeth. Although invincible to other creatures such as Megalodon sharks, they eventually become extinct because they cannot adapt to climate change on Earth.

Baleen whale possesses a realistic "tooth" that resembles a giant beard inside its mouth. When whales open their mouths and suck in water, krill and other food will get stuck in their teeth so they can nibble.

To know the age of dolphins, there is a good way to spit out a tooth and cut it apart to see. This creature's teeth also have growth rings, also called age rings, that form each year, adding a ring like the trunk of a tree.