7 weirdest sharks in the world: Rare species with truly bizarre features

Sharks are usually seen as one type of animal that hunts the oceans, but in fact, there are a lot of them. Some of them even have features so strange that they almost look like beings from another world, for example, having an elongated snout or glowing skin or tails that look like a whip. Usually, these are different ways for the animal to adapt to a deep-sea environment, a way of hunting, or a way to survive, which shows how far evolution has given the elasmobranchs the ability to change. Scientists studying the ocean keep discovering amazing behavioural and morphological traits in species, which makes us rethink the whole oceanic life concept. By looking at these weird sharks, not only can one understand how complex the marine ecosystems are but also how many mysteries the ocean has that these incredible creatures live in the least explored parts of the sea.

Why some sharks look and behave so differently

Sharks have gone through the process of evolution for hundreds of millions of years and along the way they have acquired different physical and behavioural characteristics that make some of them look like they come from another planet. Their deep-sea living could be a reason to have those traits, which might also be a result of scarce food supply or some new hunting method. Over time, isolation in extreme environments has pushed certain species to develop highly specialised traits, many of which would seem unnecessary or even bizarre in shallow waters, but prove vital where survival margins are razor thin. The list below shows the seven sharks that are the weirdest ones in the world:

1. Goblin shark
2. Frilled shark
3. Hammerhead shark
4. Cookiecutter shark
5. Thresher shark
6. Sawshark
7. Lantern shark

Each of these creatures has some kind of features that are rare, extremely developed or highly specialised and thus, they serve as a window into the vastness of shark evolution as well as the difficulty of survival in various aquatic habitats.

1. Goblin shark

The goblin shark can be easily identified by its long and flat snout as well as its can quickly highly protrusible jaws.

It is often referred to as a living fossil because its ancestors can be traced back to a million years ago and yet it has hardly evolved since then.

The goblin sharks can be found in the deep sea around Japan, and the Atlantic and the Pacific areas as well, and they are usually at a depth where the sun cannot get through. Its soft and flabby body is perfect for high pressure and low energy environments, and its electro-sensitive snout makes it easy for the shark to detect very weak electrical signals emitted by the prey.

It has a combination of a very old looking body and an extremely unique way of feeding which makes goblin sharks rank among the weirdest creatures in the oceans.

2. Frilled shark

Frilled shark has an elongated, eel-like body that can grow up to two meters long, which makes it highly manoeuvrable within the confined spaces of the deep-sea habitat.

It has six pairs of gill slits that give the throat a frilled look, from which its name is derived.

Frilled sharks mainly prey on cephalopods and fish and their needle-like teeth are use to firmly hold the prey not to chew it.

Besides this, they are known for extremely long gestation periods which can last for up to three and half years, this being very rare among the shark's reproductive cycle, and this attribute is reflective of the adaptation to the environment where food is scarce.

The frilled shark’s ancient morphology and slow reproductive cycle make it a compelling example of evolutionary persistence.

3. Hammerhead shark

Among the hammerhead sharks, the great and scalloped one, are easily distinguishable with the wide flat head called cephalofoils.

The function of this peculiar form is a sensory tool, which helps the animal to find the prey that is hiding under the sand or mud with great accuracy.

Besides that, the head works as a manoeuvrability enhancer, thus helping the animal in hunting, while it might also regulate the body temperature and aerodynamic/hydrodynamic functions.

Unlike a majority of single large sharks, hammerhead sharks are seen grouping in schools, which might be a way for them to protect each other or help in mating.

Living both inshore and offshore waters, hammerheads are a perfect example of how highly developed anatomy can give a creature a number of different functionality advantages at the same time which makes it unusual not only from a visual point of view but from a behavioural standpoint as well.

4. Cookiecutter shark

The cookiecutter shark is very small and its body length is less than half a meter; still, by far the most targeted animals will be the huge ones as the shark will take a cut from them in order to feed itself.

It has suctorial lips and serrated teeth which it uses to allow it to cling to a victim before removing the tissue quickly and efficiently.

This animal is found in the tropics and subtropics and uses the light it produces to hide from the predators it is located in the middle of the ocean.

By using its feeding manner along with the camouflaging, one lantern shows a great adaptability to life in the deep blue ocean where the sun does not shine.

5. Thresher shark

Theoretically speaking thresher shark’s longest upper caudal fin can be the double of the rest of the body length.

By employing this tail, they are able to immobilise fish coming from different directions that they strike one after the other.

By seeing their prey and also by using the lateral line to hear the movements of their prey, threshers are capable of catching the prey in the most efficient way possible through a perfect combination of habit and body structure.

After mating, the female gives birth to live young, thus offspring have higher chances of survival in a sea environment that is quite unstable.

The whip-like tail and sophisticated hunting methods make thresher sharks one of the most unusual predators among large shark species.

6. Sawshark

Sawsharks feature a long, flat snout that is bordered with sharp teeth, just like a saw that can be utilised either to cut morsels from the school of fish or from a paralyze the prey at the same time.

Moreover, they live in the deep and cold regions of the temperate and subtropical waters and resort to sight and electroreception to locate hidden or sometimes camouflaged prey.

Although they are just alike in shape to sawfish and are even sometimes confused with them, sawsharks are genuine sharks as they have paired gill slits and elasmobranch characteristics.

Their specialised feeding technique and distinctive morphology illustrate convergent evolution, showing how similar predatory pressures can produce comparable solutions in unrelated species.

7. Lantern shark

On most occasions, the size of lantern sharks, which are provided with photophores that enable them to produce bioluminescence, is below 60 centimetres.

One feature these photophores could have is concealing the animal from its predators and there might be other reasons besides that, such as to attract the prey or giving off light to let the other lamps know that they are here.

Also, they live in the dark places of the deep and feed on small fish and planktonic organisms, using the stealth strategy rather than the size.

Making lantern sharks the subject of the study raises awareness of deep-sea bioluminescence, predator-prey dynamics, and adaptations to extreme environments, thus revealing the intricate and surprising strategies that life uses to prosper far away from the ‍‌‍‍‌‍‌‍‍‌sun.






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