Answer:
Fishes that drink large amounts of water and excrete concentrated urine are referred to as "osmoregulators." Osmoregulation is the process by which organisms maintain proper water and salt balance within their bodies, adjusting to different environments and varying levels of salt concentration. Some fish species living in environments with lower salinity, such as freshwater, need to actively take in water to prevent dehydration and then excrete concentrated urine to get rid of excess water. This helps them maintain the proper balance of water and salts within their bodies despite the surrounding conditions.