What creatures are in the sea, and what is the largest creature in the ocean?

Why do so many creatures live in the sea? What secrets are hidden in the depths of the sea?

The largest creature in the ocean is the blue whale, which is widespread and not a fish in nature.

The blue whale is the largest creature in the ocean, a mammal, but its main hunting object is some small marine animals, which are very large.

There are countless creatures in the sea, and the list is endless. Sharks, whales, dolphins, octopuses, abalone, tuna, conch, turtles, seals, sea lions, walruses, jellyfish.

Including marine animals, marine plants, microorganisms and viruses, among which marine animals include invertebrates and vertebrates. Invertebrates include a variety of snails and shellfish. Vertebrates include a variety of fish and large marine animals.

Marine animals: sharks, whales, jellyfish, etc.

Marine plants: kelp, wakame, staghorn, kelp, hijiki (sargassum), etc.

Marine microorganisms: The marine environment is characterized by high salinity, high pressure, low temperatures, and thin nutrients compared to land. Marine microorganisms have their own unique characteristics because they have adapted to the complex marine environment for a long time and survived.

Why do so many creatures live in the sea? What secrets are hidden in the depths of the sea?

Corals, various marine plants (seaweed, kelp, etc.), marine plankton, molluscs (starfish, jellyfish, sea cucumbers), various shellfish, fish, mammals (dolphins, whales), etc.

The animals in the sea include seahorses, sharks, jellyfish, tuna, crabs, squid, octopus, turtles, oysters, whales, abalone, hairtail, white minnows, pressed minnows, redfin fish, tenchfish, dolphins, sea lions, etc.; There are mainly algae plants in the sea, such as cyanobacteria, red algae, brown algae, green algae, coral, kelp, sponge, spirulina, rotaphylla, etc.

Most of the animals that live in the sea are aquatic animals that have not been separated from the water during the evolution of the species, or aquatic animals that have been transformed from terrestrial animals to aquatic animals, and they can perform aerobic respiration in the water, such as whales, which breathe with their lungs.

The plants in the sea are mainly algae, and sometimes there are others, such as algae plants reproduction rate is very fast, so in some sea areas, the wild growth of algae will cause eutrophication of seawater, affecting the life of animals in the sea, and also affecting the growth of nearby plants.

These animals and plants are interdependent, for example, after the death of animals, the corpses decompose to become the nutrients of aquatic plants, and many plants are the food of animals, so they are indispensable to others.