Tristanians call both Shortfin and Blue shark a Bottlenose shark because they look similar both having blue coloration and a long snout. But Blue sharks are slim and have two long pectoral fins.
They use their powerful tail to leap out of the water! Shortfin mako has two dorsal fins (but the second one is tiny), five pairs of gill slits and a dark blue coloration. Its pointy – sharp snout and powerful tail makes it the fastest shark in the ocean, while its large black eyes make it a powerful hunter.
It is the most common shark in Tristan waters! And now protected within the MPZ since its global population is declining. Rock shark is distinct from other sharks because it has only one dorsal fin and seven pairs of gill slits. Its known locally as rock shark because of its round and grey head. It has a wide mouth and small eyes. When encountered under water it looks like it is smiling.