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Animals in the Layers of the Ocean
Transcript of Animals in the Layers of the Ocean
and is often refered to as the Midnight
Zone because sun light does not
penitrate this deep.The only light in
this layer is from the bioluminescent
creatures that live here. This zone is
from 1000 meters down to 4000 meters. This zone has an amazing amount of pressure 5,850 pounds per square inch! But, despite this huge amount of pressure a large number of creatures can be found in this zone. The forth zone is the Abyss the depth is from 4000
meters to 6000 meters. The name comes from Greek
it means "no bottom". The tempurature is near freezing
and there is no light at all. Very few creatures can be
found at these crushing depths. Most of these are
invertebrates such as basket stars and tiny squids.
Three-quarters of the ocean floor lies within this zone. The final zone is the Hadalpelagic Zone the depths
are from 6000 meters to the bottom of the deepest
parts of the ocean. The deepest trench in the ocean
is located in the Mariana Trench off the coast of
Japan at 35,797 feet. In this layer the tempurature is
barly above freezing. The pressure is an astonishing
eight tons per square inch! Despite the crushing pressure
andd freezing water life can still survive here examples
are starfish and tube worms can thrive at these depths. Bioluminescence Bioluminescence is a marine attribute and it is not found in fresh water. On land very few species possess the bioluminescent quality. Hundreds of species of fish and invertebrates flash their colors in a light show How does Bioluminescence occur? Bioluminescence occurs when certain chemicals are mixed together. Most of the light created by marine organisms is blue-green in color. This is because blue light travels best in water, and because most marine organisms are sensitive to blue light.Marine creatures produce light with special organs called photophores. Bioluminescence is the chemical reaction of two chemicals.The first is known as a luciferin. This is the chemical that actually creates the light. The second chemical is called a luciferase and is the substance that causes the chemical reaction. When these chemicals are mixed together in the presence of oxygen, light is produced. Epipelagic Zone (Sunlight Zone) Because of the large amount of sunlight that reaches this layer many plant species and marine life can live in this layer.The tempuratures are relativly warm and are an easy climate for marine life to live in. Some examples of life in this layer are sharks, tuna, mackerel, jellyfish, sea turtles, seals and sea lions and stingrays. Animals in the Sunlight Zone Animals in the Twilight Zone Because of the small amout of sunlight animals that live in this layer have to be able to survive colder tepuratures. Also, because of the lack of sunlight plants can not live in this layer. There is not enough sunlight for plants to photosynthesize. Some animals that live in this layer include octopus, squid, and the hatchet fish The Sunlight Zone acounts for about 90% of ocean life due to its mild climate. Some animals that live in this layer are sharks, sea turtles, seals, jellyfish and plants. Very few plants can live in this environment this is because the lack of sun light. Without sunlight plants can not photosynthesize. But some animals that can live in this layer include crabs, some shark, and lobster. There is no sunlight that shines through to
this layer. The only light in this layer in from
the animals themselves. Some examples of
animals that live here are squuid and eels. The biggest zone in the Ocean is the Abyss but there
are few animals that can survive these nearly freezing
tempurature and crushing pressure. Word Cited http://www.seasky.org/deep-sea/ocean-layers.html