The rarest sea creatures

As we know the ocean is the home of millions of species, some of which are very common and popular, and others that are unknown and have an unusual appearance; therefore, scientists are still investigating the ocean's depth to find more variety of these creatures with impressive characteristics. Besides being qualified as the weirdest creatures of the ocean, they are wonderful species that contribute to the survival of their ecosystem and have the power to surprise those who see them.

Here are some of the rarest ocean's animals:

Vampire squid: 

Vampire squid are cephalopods that are about the shape, size, and color of a football. The name “vampire” was given to these little squids because of the dark blood-red coloration, eye color (sometimes blue in different lighting), and what looked like spines on the tentacles. These gave rise to the false idea that it sucked blood out of its victims. In fact, these squids float peacefully in their deep, dark, oxygen-deprived habitat, waiting for food to come to them and collecting marine snow and other drifting debris.

Sea Pig:

The sea pig may get its name from its pink-colored body and love of the muddy seafloor, it's actually a type of sea cucumber. The odd-looking, but surprisingly adorable creature has tube feet on its underbelly, back, and surrounding its mouth. Compared to a human, sea pigs aren't large. Most measure between 1.5 and 6 inches (4-15 centimeters) long. The sea pig spends its days snuffling through the muddy sediments on the seafloor, eating bits of dead algae and animals that have fallen from the surface.

Emperor shrimp: 

The Emperor shrimp (Periclimenes imperator) is one of the more vividly colored shrimp around. It has a maximum body length of about 25 mm and, although their colors vary slightly, the usual base body color is red with white on the carapace and tail. The most common place to find this species is on the Spanish Dancer nudibranch. Generally, there will be a pair on each specimen, but they often hide under the nudibranch or in the gills. 

Frilled Shark:

The frilled shark is a strange, prehistoric-looking shark that lives in the open ocean and spends much of its time in deep, dark waters far below the sea surface. Its long, cylindrical body reaches lengths of nearly 7 feet (2m), and its fins are placed far back on the body. This shark has an elongated eel-shaped body and a flattened snake-like head with a very short snout and a large terminal mouth. The frilled shark gets its name from the frilly appearance of its gill slits. Frilled sharks are active predators and may linge at potential prey, swallowing it whole, even if it is quite large. 

Peacock Mantis Shrimp: 

Peacock mantis shrimp get their name from their kaleidoscope shell, like a peacock’s tail, and their hinged forearms that resemble those of a praying mantis. They are one of the most colorful species of mantis shrimp. Their narrow, hard-shelled bodies are shades of orange, green, red and blue. They are primarily green with orange legs and leopard-like spots. Peacock mantis shrimp are powerful hunters, feeding on hard-shelled invertebrates of all kinds and even some fishes. They are well known for the extremely fast punching motion that they do with their front appendages to fill and break apart their prey.