The term 'oyster catch' refers to the process of harvesting oysters from their natural habitats. Oysters are typically found in shallow coastal waters and can be harvested by hand or with specialized tools. The crossword solution for the term 'oyster catch' is 'PEARL, ' which is a product of oysters. Pearls are formed when an irritant, such as a grain of sand, enters an oyster's shell and the oyster secretes a substance called nacre to protect itself. This nacre builds up over time and forms a PEARL.