The shark has senses specially designed for the animal’s life underwater. Smell is a shark’s most acute sense. Experiments have shown that sharks can detect _____ (1) prey solely by smell.
Sharks are sensitive to light and can detect certain objects even in ______ (2) water. Shark can both sense electric ___ (3) magnetic fields.
Sensory pores located on the shark’s head can detect a prey’s bioelectric field even if the prey _____ (4) in sand. A shark can also detect the Earth’s magnetic field. Open-ocean sharks may use this _____ (5) to navigate themselves.