Bull sharks are one of the shark species that can survive in freshwater due to their ability to osmoregulate or maintain water levels in their body. Click to read more.
Thanks to years of effective fisheries management and conservation efforts, the future looks better for some tuna and billfish species, including southern bluefin tuna, black marlins, and swordfish, after decades of population decrease. However, a new study indicates that certain sharks that reside in the open ocean habitats of these species still face threats.