The 31 acre Campus Lagoon is one of three coastal lagoons in the area, however each has a different hydrology. The Campus Lagoon receives a constant influx of sea water from the seawater pumping facility of approximately 700 gallons per minute (about 1cfs), but has no tidal influence. The Lagoon also receives runoff from 151 of the 300 acres of main campus which makes the Lagoon brackish during the winter and early spring (17 ppt). Devereux Slough has a watershed of about 2000 acres and is closed to tidal influence by a naturally forming sandbar at the mouth of the slough for most of the year. Goleta Slough mouth is open about 50% of the time and regularly receives tidal influx. The Campus Lagoon shoreline is primarily dominated by salt marsh species, but where there are surface freshwater flows other riparian and freshwater wetlands are formed. Fish such as Top smelt, Longjaw mudsucker and Killifish are common in the Lagoon.