The history of the bay name is unclear. The most popular story is that Captain Mifflin Kenedy, after visiting the Arctic Baffin Bay as a young man, gave the same name to the bay in Texas because of the remarkable contrast between the bays. The Arctic Baffin Bay is located between the Baffin Island of Canada and Greenland, and it is about 310 times larger by area than the Baffin Bay in Texas.
Hydrology
The Baffin Bay has three branches, which are named as follows : Alazan Bay on the north, Cayo del Grullo and Laguna Salada. Several ephemeral streams, including San Fernando, Santa Gertrudis and Los Olmos, flow into the bay, but only when it rains. Because of the scarce freshwater inflow and extensive evaporation, which is promoted by shallow water and warm climate, the bay has a relatively high water salinity reaching 75‰ in its northern part. Between 1946 and 1948 and in 1968, the salinity level in the bay exceeded 100‰ killing much fish in the area. About 21 km2 of the bottom of the bay is covered in seagrass; most other parts are dominated by shoal grass with occasional rocky outcrops. Scattered parts of the bay, mostly near the mouth, contain the relictserpulid worm reefs, which are composed of the remains of serpulid tube worms. Although some tube worm species still inhabit the bay area and the reefs, they bring no significant contribution to the reef structure. Most reefs are circular or ellipsoid structures between 8 and 40 meters in diameter and 0.5 to 2 meters in height above the sediment. Their total area is about 16 km2, but it is gradually reducing due to erosion.
Climate
The climate has been described as semiarid, subhumid or subtropical, with a very varying precipitation. Tropical storms and hurricanes are common, and they strongly alter the climate and hydrology of the region.
Flora and fauna
The lands around the bay are flat and dominated by grasslands and oak savanna; they are used for agriculture and cattle farming. Common tree and plant species include southern live oak, prickly pear, lime prickly-ash, greenbriar, sunflowers, tanglehead, crinkleawn, gulfdune paspalum, fringed signalgrass, shrubby oxalis, dayflower, Texas lantana, Texas bullnettle, silverleaf nightshade, crotons and Lindheimer tephrosia. The waters of the bay contain several species of annelids and 29 species of diatoms. The dominant mollusks are dwarf surf clams and Capitella capitata. The serpulid worm reefs are inhabited by crustaceans, polychaetes and mollusks. Invertebrates are represented by the endemic fiddler crab species Uca subcylindrica, which reside on dry soil, more than 20 meters from bay waters. The bay is a popular destination for recreational angling and is famous for its trophy spotted seatrout. Other species include redfish, threadfin shad, pompano, black drum and burrowing goby, etc.
