Mud banks are unique in nature. They are calm, turbid waters with loads of suspended sediments, which occur in the coastal regions mainly during the south-west monsoon season. The mud churned up, and this mud was kept in suspension, making the water highly turbid. They may appear in a semicircular shape with the distance (5–6 km offshore) escaping the oxygen depleted water, and the fish aggregate within a thin upper layer, allowing easy visual identification and capturing the fish shoals. The higher phosphate content of the sediments at these facilities increased productivity by increasing the number of zooplankton. They are characterised by heavy suspensions of dark , grayish-green fine clay. 

Those muddy waters are free from surface disturbance; there is no wave even during peak monsoon season. Mud banks are free from action while adjacent beaches experience soil erosion. The fineness of the mud gives it an oily feel. It consists of ¾ clay and ¼ slit.
According to Ramasastry and Myrland in 1959, the formation of mud banks can be due to underground discharge of mud from mud banks, wave action on bottom mud, upwelling, and mud bank formation. 

Fisheries for fishermen

Mud banks are the best time for fishermen in Kerala. It is the calm condition that operates the available gears to catch the fish.This time, an area that was created by mud banks has attracted fishermen in large numbers from a wide area. In this calm region, traditionally fishermen will use non-motorized country crafts; these crafts can carry out fishing within this region. With the introduction of mechanised fishing, fisheries have become less prominent. Although the former is still an important fish landing area, launching and landing canoes is very easy in the mud bank area. Most centres intended for fishing mud banks are Nitikka and Alappuzha. This current carries oxygen-deficient bottom water to the upper water column.

Fish chagara
Mudbanks’ phenomenon is also called chagara. Mudbanks are rich in prawns, oil sardines, mackerel, and other various seafood. The food availability at the bottom of the sea is made available to pelagic fishes, which migrate to overlying water for feeding. Some important fish tend to carry around these areas for feeding, making the mudbanks rich in fisheries wealth.
Fish rain from the sky
This animal rain is not a fairy tale; it is the meteorological phenomenon experts refer to as "animal rain." When waterspouts occur, they function like tornadoes over a moving water body, sucking up small creatures such as fish, turtles, crabs, and prawns that frogs are carrying along until the final dropping is made on land. This is a miraculous event that happened in the city of Texarkana. Attributes were surprised when they saw fish dropping from the sky along with rain. It may occur four times in a year.

Aerial drop of fish 

Since the 1950s, Utah has engaged in efforts to support fish populations. "Using this, they opened a hatch and dropped thousands of fish from planes from the sky; it’s very efficient and less stressful on the fish because we can get them into that higher, oxygenated water sooner." To avoid reproduction and any damage to native species, the non-native fish discharged are often sterile fish from the sky. According to DWR, restocking a lake with this aerial drop technique is the most effective because it can reach seven distinct lakes in one flight and 40 to 60 lakes per day. This is how the state annually replenishes more than 300 lakes.