The common basilisk can be distinguished from similar species within its range by its large size and the high fin-like crest along its back.

While the common basilisk is most known for its ability to run on water, it is also an excellent climber and swimmer, and has been known to stay underwater for up to half an hour.

When startled, the common basilisk escapes by speeding to the nearest edge of water—and continues sprinting.

The common basilisk is adroit on water because its feet are large and equipped with flaps of skin along the toes that allow it to catch on tiny air bubbles.

Once a basilisk submerges, it continues swimming until it is sufficiently far from its pursuer — if the predator has followed past the bank.

Although the common basilisk stays close to water to escape terrestrial predators, it swims only when necessary because some other aquatic animals would eat it given the chance.

B. basiliscus is an omnivore; its diet consists of insects, for example, beetles or dragon flies; flowers, and small vertebrates such as snakes, birds, eggs, and fish.

To avoid predators, it can conceal itself under leaves on the forest floor and can remain motionless for a long time.

[citation needed] Juveniles can usually run farther than older basilisks, while holding more of their body above the water.

[3] Its generic, specific, and common names all derive from the Greek basilískos (βασιλίσκος), meaning 'little king'.