What is a very low tulle like little cloud?

Cirrus (ci, cirrus).

Cirrocumulus (CC, Cirrocumulus).

Cirrostratus (CS, Cirrostratus).

High clouds form at an altitude of more than 6,000 meters, in the cooler part of the troposphere. There are three genera, all of which are of the cirrus species. At this altitude, water freezes and crystallizes, so the clouds of this group are made up of ice crystals. High clouds are generally fibrous, thin and mostly transparent.

Altocumulus (AC) and Altostratus (AS) in the mesocloud family

Mid-clouds form at an altitude of 2,500 to 6,000 meters. They are made up of small drops of water that are overfrozen.

Low cloud family: Nimbostratus (ns, nimbostratus), stratocumulus (sc, stratocumulus), stratus (st, stratus).

Low clouds form in the atmosphere below 2,500 meters. These include dense grey Stratus, Stratocumulus (discontinuous Stratus) and dense grey and rainy Nimbostratus. Stratus clouds are grounded and are called fog.

Cumulus (cumulus).

Cumulonimbus (CB, Cumulonimbus).

Straight clouds have very strong updrafts, so they can grow all the way from the bottom to higher updrafts. Cumulonimbus clouds with heavy rainfall and thunderstorms can start at a height close to the ground and grow all the way to an altitude of 75,000 feet. At the base of the Cumulonimbus cloud, milky clouds like pouches form when the cooler air in the fall meets the warmer air in the rise.

Thin clouds form at the top of the Cumulonimbus when they expand.

It's supposed to be cirrus, but it doesn't seem to be low?

Clouds are the tangible result of the vast water cycle on Earth. When the sun shines on the Earth's surface, the water evaporates to form water vapor, and once the water vapor is supersaturated, water molecules collect around the dust (condensation nuclei) in the air, and the resulting water droplets or ice crystals scatter sunlight in all directions, which gives the appearance of clouds. Because clouds reflect and scatter electromagnetic waves in all bands, clouds are grayscale in color, white when they are thin, but they can appear gray or black when they become too thick or dense for sunlight to pass through.

The sky was full of clouds of different colors, some white as flocculent, some as jet black, some as gray as it was, and some glowing red and purple. Here, the thickness of the clouds determines the color, and the thickness of the various clouds we see varies greatly, with a thickness of up to 7-8 kilometers and a thin one of only a few tens of meters. There are many types of stratiform clouds, solitary cumulinary clouds, and undulating clouds.

Very thick stratiform clouds, or cumulonimbus clouds, where the light of the sun and moon is difficult to penetrate, and the clouds appear very dark; Slightly thinner stratiform and undulating clouds, which appear gray, especially undulating clouds, with more grayish colors at the edges of the clouds; Very thin clouds, light is easy to pass through, especially thin clouds composed of ice crystals, the filaments appear particularly bright in the sun, with a silky luster, and even if there are such stratiform clouds in the sky, ground objects will still reflect shadows in the light of the sun and the moon. Sometimes the clouds are so thin that they are barely visible, but as long as one or several large rings are found near the sun and moon, it can still be concluded that there are clouds, which are called "cirrostratus clouds". Isolated cumulonial clouds, which appear to be white because of the thicker cloud layer and the sunny side, where the light is almost entirely reflected; On the backlit side and its bottom, the light is not easy to transmit, and it looks grayish and black.

At sunrise and sunset, because the sun's rays are obliquely shining through, passing through a very thick atmosphere, the air molecules, water vapor and impurities, so that the short-wave part of the light is scattered in large quantities, while the long-wave part of red and orange is not scattered, so when it is irradiated to the lower atmosphere, the long-wave light, especially the red light, accounts for the absolute majority, at this time, not only the sky in the sunrise and sunset direction is red, but even the bottom and edge of the cloud illuminated by it also turn red. Because the clouds are composed of water droplets, ice crystals, and a mixture of the two, the light of the sun and the moon can also cause all kinds of beautiful halos or rainbows when they pass through.