Penguin

Penguins are a group of aquatic, flightless birds living almost exclusively in the southern hemisphere, especially in Antarctica. Highly adapted for life in the water, penguins have countershaded dark and white plumage, and their wings have become flippers. Most penguins feed on krill, fish, squid, and other forms of sea life caught while swimming underwater. They spend about half of their lives on land and half in the oceans. All penguin species are native to the southern hemisphere. The largest living species is the Emperor Penguin adults average about 1.1 m tall and weigh 35 kg or more. The smallest penguin species is the Little Blue Penguin, also known as the Fairy Penguin, which stands around 40 cm tall and weighs 1 kg.

Image of penguins

Image of penguins

Image of penguins

Image of penguins

Puffin

Puffins are pelagic seabirds that feed primarily by diving in the water. They breed in large colonies on coastal cliffs or offshore islands, nesting in crevices among rocks or in burrows in the soil. Two species, the Tufted Puffin and Horned Puffin, are found in the North Pacific Ocean, while the Atlantic Puffin is found in the North Atlantic Ocean. All puffin species have predominantly black or black and white plumage, a stocky build, and large beaks. They shed the colourful outer parts of their bills after the breeding season, leaving a smaller and duller beak. Their short wings are adapted for swimming with a flying technique under water. In the air, they beat their wings rapidly (up to 400 times per minute) in swift flight, often flying low over the ocean's surface.

Image of flying puffin

Image of flying puffin

Image of flying puffin

Image of a group of puffins on rock

Image of puffin and a dummy puffin

Green Sea Turtle

The Green sea turtle or green turtle is a large sea turtle. It is the only species in the genus Chelonia. Its range extends throughout tropical and subtropical seas around the world, with two distinct populations in the Atlantic and Pacific Oceans. The green sea turtle is a sea turtle, possessing a dorsoventrally flattened body covered by a large, teardrop-shaped carapace and a pair of large, paddle-like flippers. It is usually lightly colored, although parts of the carapace can be almost black in the eastern Pacific. It is mostly herbivorous. The adults commonly inhabit shallow lagoons, feeding mostly on various species of seagrasses. Like other sea turtles, they migrate long distances between feeding grounds and hatching beaches. Many islands worldwide are known as Turtle Island due to green sea turtles nesting on their beaches. Females crawl out on beaches, dig nests and lay eggs during the night. Later, hatchlings emerge and walk into the water. Those that reach maturity may live to age 80 in the wild. It is illegal to collect, harm or kill them. In addition, many countries have laws and ordinances to protect nesting areas. However, turtles are still in danger because of several human practices. In some countries, turtles and their eggs are hunted for food. Pollution indirectly harms turtles at both population and individual scales. Many turtles die caught in fishing nets.

Image of green sea turtle with colorful fish

A beautiful image of green sea turtle

Photo of green sea turtle

Picture of green sea turtle

Image of green sea turtle

Great White Shark

The great white shark, also known as the great white, white pointer, white shark, or white death, is a large lamniform shark found in coastal surface waters in all major oceans. The great white shark is known for its size, with the largest individuals known to have approached or exceeded 6 meters in length, and 2,268 kilograms in weight. This shark reaches maturity at around 15 years of age and can have a life span of over 30 years. The great white shark is arguably the world's largest known extant macropredatory fish and is one of the primary predators of marine mammals. It is also known to prey upon a variety of other marine animals including fish, pinnipeds, and seabirds. It is the only known surviving species of its genus, Carcharodon, and is ranked first in a list of number of recorded attacks on humans. The best selling novel Jaws by Peter Benchley and the subsequent blockbuster film by Steven Spielberg depicted the great white shark as a "ferocious man eater". In reality, humans are not the preferred prey of the great white shark.

Image of great white shark

Image of great white shark

Picture of great white shark

Photo of great white shark

Sharks

Sharks are a type of fish with a full cartilaginous skeleton and a highly streamlined body.Sharks have more than 440 species, ranging in size from the small dwarf lanternshark, Etmopterus perryi, a deep sea species of only 17 centimetres in length, to the whale shark, Rhincodon typus, the largest fish, which reaches approximately 12 metres. Sharks are found in all seas and are common down to depths of 2,000 metres. They generally do not live in freshwater, with a few exceptions such as the bull shark and the river shark which can live both in seawater and freshwater. They breathe through five to seven gill slits. Sharks have a covering of dermal denticles that protects their skin from damage and parasites, and improves their fluid dynamics so the shark can move faster. They have several sets of replaceable teeth. Well-known species such as the great white shark, tiger shark, blue shark, mako shark, and the hammerhead are apex predators, at the top of the underwater food chain.

Image of Shark

Image of Shark

Image of Whale Shark

Image of Shark

Image of hammerhead Shark

Introduction of Fish

Fish are a paraphyletic group of organisms that consist of all gill-bearing aquatic vertebrate animals that lacks limbs with digits. Fish are abundant in most bodies of water. They can be found in nearly all aquatic environments, from high mountain streams to depths of the deepest oceans. About 32,000 species of fish are found so far. Fish are an important source of food worldwide.

Images of some fish

Introduction of marine life

A large proportion of all life on Earth exists in the oceans. Exactly how large the proportion is unknown, since many ocean species are still to be discovered. Large areas beneath the ocean surface still remain effectively unexplored. While the oceans constitute about 71% of the Earth's surface, due to their depth they encompass about 300 times the habitable volume of the terrestrial habitats on Earth. A large number of animals, birds, fish, invertebrates, mammals, reptiles, fungi, plants and microorganisms species live in or are related to marines. Many species are economically important to humans, including food fish. It is also becoming understood that the well-being of marine organisms and other organisms are linked in very fundamental ways.

Images of some marine life