The SoCal mako season runs from May through the fall; however, finding the fish isn't so easy, because the biggest sharks travel alone. Most experts agree that one clue to the big makos' whereabouts is the presence of clear, blue water of the right temperature. "Makos are semi-tropical fish, and tend to move in en masse when the surface temperature reaches 64 to 68 degrees," says Von Leer. "When the water gets much warmer than this, you get a lot of rats (small makos) moving in. Once the warm water is scattered up and down the coast, I'll look for pockets of cooler (62 to 63 degrees) water, which tend to harbor the bigger fish. It's thought that big makos can regulate their body temperature, allowing them to travel and feed in these cooler zones. If I find a temperature break and good, clean water, I'll always focus on the cool side of the break.