catch; caught fish
Refers to the fish or marine life caught during fishing; used in fishing contexts.
Today's catch was mainly mackerel.
The landing of the catch has begun.
漁獲高 refers to the amount or volume of the catch, often used in statistics, whereas 漁獲物 is the actual catch itself.
Compound of 漁獲 (gyokaku, 'fishing catch') + 物 (butsu, 'thing'). The exact historical derivation is uncertain, but the word is transparently formed from these components.