Gigantism (and it's opposite, dwarfism) can occur in any isolated environment. We call it insular gigantism or insular dwarfism (although it doesn't always happen on an island, just in an area that is island like, such as deep underwater and in the middle of the jungle). This is how we think the Pygmies evolved in the middle of the jungle. There is an island called Flores in Indonesia. Here we can find giant rats and other things that are way bigger than their relatives everywhere else. In the past on that island many things were smaller than they should be instead of bigger. We even found remnants of an early humanoid that was much shorter than us but fairly close to our intelligence (according to the size of their Brodmann's area 10). I think we named it homo florenses. So, it turns out that whenever you isolate an ecosystem, everything in that ecosystem may evolve to be smaller or larger.
Cooperation and competition among ocean animals is very common. One example of competition is two sharks fighting for the same fish.
because animals wont live
The electric eel is an ocean animal. The epaulette shark is found in the tropical ocean waters off the coast of Australia.
The skeletons of tiny ocean animals grow together to form coral, structures that are found only in warm clear ocean waters
Tropical ocean waters are more saline than colder waters because tropical waters undergo ocean currents due to the vertical and horizontal movement of seawater.
Orka, octopus, seals and sea lions,
Its a process called chemosynthesis I think.
arctic ocean
Sycon ciliatum are marine sponges found all over the world, usually in shallow waters. They thrive in warmer waters, such as the Indian Ocean, Mediterranean Sea, and the Pacific Ocean. They are found on the underside of rocks in relatively protected areas among other marine organisms.
The tropical ocean waters are more saline than colder waters because due to ocean circulation, as seawater moves in horizontal and vertical directions.
Tropical ocean waters are more saline than colder waters because tropical waters undergo ocean currents due to the vertical and horizontal movement of seawater.
waters of the ocean that move in giant streams are called currents.