The bull shark is an euryhaline species that moves at will from fresh to salt water, and many marine fish make a diel vertical migration, rising to the surface to feed at night and sinking to lower layers of the ocean by day.
32.
Despite having a regular freshwater presence, the Atlantic stingray is physiologically euryhaline and no population has evolved the specialized diffuse into their bodies, and they must produce large quantities of dilute urine ( at 10 times the rate of marine individuals ) to compensate.
33.
Further east, the salinity increases and the freshwater fish species are completely replaced by euryhaline marine ones, until the river reaches Gravesend, at which point conditions become fully marine and the fish fauna resembles that of the adjacent North Sea and includes both euryhaline and stenohaline marine species.
34.
Further east, the salinity increases and the freshwater fish species are completely replaced by euryhaline marine ones, until the river reaches Gravesend, at which point conditions become fully marine and the fish fauna resembles that of the adjacent North Sea and includes both euryhaline and stenohaline marine species.
35.
""'Brachionus plicatilis " "'is a euryhaline ( tolerate a wide range of salinity ) rotifer in the Family " Brachionidae ", and is possibly the only commercially important rotifer, being raised in the aquaculture industry as food for fish larvae.
36.
This facies contains a well-preserved mixed assemblage of terrestrial ( conifers, insects, myriapods, reptiles ), freshwater ( ostracods ), aquatic ( amphibians, reptile ), brackish or euryhaline ( ostracods, eurypterids, microconchids, fish ), and marine ( brachiopods, echinoderms ) fossils.
