What are the different depths of the ocean called?

The sunlight zone, twilight zone, and deep ocean are the three major zones of the ocean. The deep ocean is further divided into 3 layers which are the midnight zone, the abyss and the trenches.

What are the three depth zones?

The three ocean zones, in order of depth, are the surface, middle realm and deep realm.

What are the zones under benthic zone?

The benthic environment is divided into a number of distinctive ecological zones based on depth, seafloor topography, and vertical gradients of physical parameters. These are the supralittoral, littoral, sublittoral, bathyal, abyssal, and hadal zones.

What benthic area is deepest?

In oceanic environments, benthic habitats can also be zoned by depth. From the shallowest to the deepest are: the epipelagic (less than 200 meters), the mesopelagic (200–1,000 meters), the bathyal (1,000–4,000 meters), the abyssal (4,000–6,000 meters) and the deepest, the hadal (below 6,000 meters).

What classification is sea urchin?

sea urchin, any of about 950 living species of spiny marine invertebrate animals (class Echinoidea, phylum Echinodermata) with a globular body and a radial arrangement of organs, shown by five bands of pores running from mouth to anus over the test (internal skeleton).

What does the depth of the water determine?

What does the depth of the water determine? It determines the amount of light that organisms can receive. What does water chemistry primarily refer to? It refers to the amount of dissolved chemicals—especially salts, nutrients, and oxygen—on which life is dependent.

What does the word benthic mean?

Definition of benthic 1 : of, relating to, or occurring at the bottom of a body of water. 2 : of, relating to, or occurring in the depths of the ocean.

What fish are found in estuaries?

Anchovies, salmon, sardines, gobies, mullets, flounder, bass, barbels, eels, shad, and even sharks—what do they have in common? Well, at certain points in their lives you may find them in estuaries, the final sections of rivers before they meet the ocean. Some fish live in estuaries their entire lives.

What forms deep sea trenches?

In particular, ocean trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench.

What is a depth zone?

Below the mesopelagic zone is the abyssopelagic zone; in most regions of the open ocean, it is the deepest zone. This zone usually extends to the ocean bottom and, combined with the mesopelagic zone, makes up roughly 75 percent of all the ocean’s volume. This zone extends to about 6000 meters deep.

What is an urchin in spongebob?

Sea urchins, also known as simply urchins and sometimes called sea hedgehogs, are small, spiny, globular animals which, with their close kin, such as sand dollars, constitute the class Echinoidea of the echinoderm phylum.

What is benthic composition?

In undisturbed areas in the eastern Mediterranean, benthic communities have a high diversity of species, consisting of polychaetes (50-65%),molluscs (15-25%), crustaceans (10-20%), echinoderms (5-8%) and miscellaneous taxa.

What is deep in the ocean?

Hadalpelagic. The hadalpelagic is the very deepest part of the ocean that includes the ocean trenches. It extends from 19,700 feet (6,000 meters) to the very bottom of the Mariana Trench at 36,070 feet (10,994 meters). Very little is known about the creatures that live at such depths.

What is depth zone?

The ocean is divided into different depth zones. The epipelagic extends from the water surface down to a depth of 200 metres. The word comes from the Greek terms pélagos (open sea) and epí (upon). The hadopelagic extends into the deep-sea trenches, down to a depth of 11,000 metres. …

What is the average depth of the atlantic ocean?

The Atlantic Ocean has an average depth (with its seas) of 11,962 feet (3,646 meters) and a maximum depth of 27,493 feet (8,380 meters) in the Puerto Rico Trench, north of the island of Puerto Rico.

What is the deepest benthic zone?

In oceanic environments, benthic habitats can also be zoned by depth. From the shallowest to the deepest are: the epipelagic (less than 200 meters), the mesopelagic (200–1,000 meters), the bathyal (1,000–4,000 meters), the abyssal (4,000–6,000 meters) and the deepest, the hadal (below 6,000 meters).

What is the deepest depth of the ocean?

The deepest part of the ocean is called the Challenger Deep and is located beneath the western Pacific Ocean in the southern end of the Mariana Trench, which runs several hundred kilometers southwest of the U.S. territorial island of Guam. Challenger Deep is approximately 10,935 meters (35,876 feet) deep.

What is the depth of bathyal zone?

bathyal zone, marine ecologic realm extending down from the edge of the continental shelf to the depth at which the water temperature is 4° C (39° F). Both of these limits are variable, but the bathyal zone is generally described as lying between 200 and 2,000 m (660 and 6,600 feet) below the surface.

What is the depth of bathyal zone?

bathyal zone, marine ecologic realm extending down from the edge of the continental shelf to the depth at which the water temperature is 4° C (39° F). Both of these limits are variable, but the bathyal zone is generally described as lying between 200 and 2,000 m (660 and 6,600 feet) below the surface.

What is the size of the purple sea urchin and where is it typically found?

The diameter of the test (shell minus the spines) is generally under 10 cm, and the height is about half the diameter. Purple sea urchins are found in both intertidal and subtidal zones. They are commonly found in exposed rocky areas, where they may erode small cavities into the rock.

What is the temperature range of the benthic zone?

Temperature in the benthic zone ranges from warmer temperatures at shallow depths because of close proximity to the water surface, but may drop to 2 °C to 3 °C at the most extreme depths of the abyssal zone. At such cold temperatures, abundance of life is quite low and organisms move at a very slow pace.