What is the red thing in the deep sea?

The red thing in the deep sea is red coral.

Red coral is a kind of hydra group animal with dendritic skeleton. In the center of each branch, there is a horny bone axis, a soft body surrounds the bone axis, and many corals grow around the axis. These cylindrical shafts are 20 cm high and 3 cm in diameter. The soft tissue of red coral consists of mesoderm and two layers of cells: endoderm and ectoderm.

Red coral has extremely strict requirements on the living environment, and can only survive in clean seawater with stable ocean currents and moderate sunshine between 30 degrees north and south latitude. Require water depth, slow water flow, no wind and wave interference, no difference between cold and summer, and the perennial temperature is almost constant at 10℃. This kind of coral cannot grow in estuaries and sea areas where nutrients are too rich or the composition of seawater changes greatly, nor can it form a bed on the continental shelf of sandy coast, so it is extremely rare.

Coral habits

Corals generally live in groups, and each individual is connected by a structure called * * * meat, which can secrete horny or calcareous exoskeletons. Coral tentacles are very small and all grow on the mouth. When seawater passes through the digestive cavity, the food and calcium in it are absorbed by it.

Coral groups have bones of different colors. Red coral is like a young tree, flourishing. Shi Zhi corals are like mushrooms rising from the ground, stonebrain corals are like human brains, antlers are like antlers with lush branches, and tubular corals are like horns embedded in rocks. Colors are light green, orange yellow, pink, blue, purple, brown and white. These colorful coral skeletons form a wonderful underwater garden on the seabed.