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Because some animals can't survive on land, so they have to live in water and they have gills so they have to have water!
Some animals, such as dolphins and whales, actually DID live on land at one time, and REGRESSED or RETREATED to the sea. No one knows why. Perhaps it was easier to survive in the seas' waters instead of upon the earth, where it may been very volcanic and warm at that time.
In other instances, perhaps jellyfish could not adapt to land because foraging in the sea was easier for them.
Many questions remain unanswered.
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∙ 13y ago
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What animals live in the open sea surface Eco system?
3 animals that live in the rainforest are tocotoucan giant sloth tree frog that live in a tropical rainforest.Three plants are a vinus fly trap,Bangel bamboo,and alot of diffrent kinds of flowers.
What animals do marine biologist study?
animals in the ocean/sea
What does the Open Ocean look like?
the open ocean is a place where u can swim
Animals of the ocean that start with l?
== ==
How many types of animals are in the ocean?
There are MILLIONS of animals in the world's oceans. Explorers are still discovering new life forms.
What animals are in an open-ocean zone?
In the open ocean you can find the Blue whale
Are small animals that serve as the main photosynthetic producers in the open ocean?
the main producer in the open ocean are
What are animals in the open ocean zone?
The animals in the open ocean zone are...1. Giant Squid2. Algae3. Fish4. Sea Stars5. much more...
What 3 animals that live in the ocean?
open sea suface
The open ocean of any depth is called?
The open ocean of any depth, where animals swim or float freely is called a pelagic zone. Salinity variations in the open ocean normally ranges from 33 to 38 percent.
How do common dolphins protect themselves from other animals in the open ocean?
Peanut butter!
What are some sea animals or sea creatures in the open ocean?
whale and fish of course
What is a open sea?
The open sea zone is a zone in the ocean that has a depth of 200 meters and has over ten species of animals.
What is a open sea zone?
The open sea zone is a zone in the ocean that has a depth of 200 meters and has over ten species of animals.
What ocean has the most animals?
The Atlanic ocean and the Pacific Ocean have the most animals
What do ocean animals have that land animals do not?
The answer is ocean animals have fins, flippers, and gills.
How does it influence the plants and animals in the ocean?
How does what influence animals in the ocean?
