Pleko Whales are the largest animals on Orquon.
These whales are so named because they behave like pleko Their ancestors actually resembled sucker fish. Their mouths are designed to eat the goo on the sea bed. On the top of their heads is a yellow sonar organ. This is used for protection against the Goliath Shark and to know where everything is. Pleko Whales are known to be very graceful and actually behave more like whales. There are two species: the Common, and Pygmy. The Common is larger than the Pygmy.
The sonar organ can stun even the Goliath Shark! The Whale can now push the Shark up to the surface. Another defense is to get together in pods.
Pleko Whales migrate every winter on the Easterly Current along with other sea creatures.