At the mouth during low tide, we observed that there were only mid and mid-high salinity fishes. Graph three shows us that the salinity in the midcreek samples also drastically differed. Graph four shows that the salinity in the upcreek samples differed a lot. There mostly mid to mid-high salinity fishes were found. Our research found that fish do migrate with changing tide.
Tidal creeks contain a freshwater-saltwater mix that varies with the tides.
Different species of fish are specialized for different levels of salinity. Fish found in high salinity areas migrate into tidal creeks with high tide following the increasing salinity level. Fish that are regularly in the lower salinity areas of the tidal creek migrate farther up tidal creeks away from the approaching high salinity water and with the lower salinity water. Some species of fish seem to tolerate low, mid, and high salinity areas. Some factors beyond salinity that may influence the distribution of fish in tidal creeks are the availability of food and presence of predators.