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Marine Biology

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So many fishes

In the Sea of Cortez some hermit crabs use living, growing Hydrocoral and others, in the Indo-Pacific region, live in the fixed wormholes left by marine worms.

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Bobbit worm

Dolphins sleep with only half of their brain and with one eye open so they can watch for predators and other threats. An Octopus has three hearts and the color of its blood is blue. At 188 decibels, the calls of blue whales is the loudest sound made by any animal on the planet.Jan 18, 2013

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Some Fishes are big and some fishes are small

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At night Parrotfish enclose themselves in a bubble of their own mucus to avoid being smelled by predators.

Sharks are covered with tiny little teeth called dermal denticles.

That’s why their skin feels like sandpaper.

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The nostrils of fish also do not open into the back of the mouth like those of mammals, and are not, therefore, for breathing. They lead into organs of smell, which are very sensitive in order for fish to detect the presence of food in the water at considerable distances. More nostrils = more smelling!

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Sharks are covered with tiny little teeth called dermal denticles.

That’s why their skin feels like sandpaper.

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Moray Eels open and close their mouths, not as an aggressive behavior but as part of their respiration process.

They’re just breathing!

At night Parrotfish enclose themselves in a bubble of their own mucus to avoid being smelled by predators.

Nudibranchs can absorb nematocysts (stinging cells) from the prey they eat and later use them as part of their defensive system.

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Nudibranchs can absorb nematocysts (stinging cells) from the prey they eat and later use them as part of their defensive system.

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Boxfish do not have a conventional bony skeleton like most vertebrate.

They literally have a bone box that only the eyes, mouth and fins stick out of.

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Damselfish are farmers growing little algae gardens.

The next time they attack you’ll just know that they are saying: “Stay off my land, yah hear!”

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Moray Eels open and close their mouths, not as an aggressive behavior but as part of their respiration process.

They’re just breathing!

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Nudibranchs can absorb nematocysts (stinging cells) from the prey they eat and later use them as part of their defensive system.

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arine biology is the scientific study of marine life, organisms in the sea. Given that in biology many phyla, families and genera have some species that live in the sea and others that live on land, marine biology classifies species based on the environment rather than on taxonomy.

A large proportion of all life on Earth lives in the ocean. The exact size of this large proportion is unknown, since many ocean species are still to be discovered. The ocean is a complex three-dimensional world[3] covering approximately 71% of the Earth's surface. The habitats studied in marine biology include everything from the tiny layers of surface water in which organisms and abiotic items may be trapped in surface tension between the ocean and atmosphere, to the depths of the oceanic trenches, sometimes 10,000 meters or more beneath the surface of the ocean. Specific habitats include coral reefs, kelp forests, seagrass meadows, the surrounds of seamounts and thermal vents, tidepools, muddy, sandy and rocky bottoms, and the open ocean (pelagic) zone, where solid objects are rare and the surface of the water is the only visible boundary. The organisms studied range from microscopic phytoplankton and zooplankton to huge cetaceans (whales) 25–32 meters (82–105 feet) in length. Marine ecology is the study of how marine organisms interact with each other and the environment.

Marine life is a vast resource, providing food, medicine, and raw materials, in addition to helping to support recreation and tourism all over the world. At a fundamental level, marine life helps determine the very nature of our planet. Marine organisms contribute significantly to the oxygen cycle, and are involved in the regulation of the Earth's climate.[4] Shorelines are in part shaped and protected by marine life, and some marine organisms even help create new land.[5]

Many species are economically important to humans, including both finfish and shellfish. It is also becoming understood that the well-being of marine organisms and other organisms are linked in fundamental ways. The human body of knowledge regarding the relationship between life in the sea and important cycles is rapidly growing, with new discoveries being made nearly every day. These cycles include those of matter (such as the carbon cycle) and of air (such as Earth's respiration, and movement of energy through ecosystems including the ocean). Large areas beneath the ocean surface still

Boxfish do not have a conventional bony skeleton like most vertebrate.

They literally have a bone box that only the eyes, mouth and fins stick out of.

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Many species of fish are hermaphrodites.

They will start their lives as females and then if a male is needed the lead female will become a male.

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Barnacles are actually crustaceans related to crabs and lobsters.

Since they are fixed to the substrate the male barnacle must use a very long reproductive part to be able to reach his mate!

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Our oceans cover more than 70 per cent of the Earth’s surface.
With so much of the Earth’s surface taken up by ocean, it’s evident how vital these marine environments are to the planet, and how much there still is to be explored.

The majority of life on Earth is aquatic.
As so much of the Earth’s surface is underwater, it comes as no surprise that marine species outnumber those on land. But, it’s an incredible 94 per cent of the Earth’s living species that exist within the oceans.