What are the 2 sense organs of a crayfish?

Crayfish possess several well-developed sense organs that enable them to perceive and respond to their environment. Two notable sensory structures in crayfish are:

1. Eyes (Compound Eyes): Crayfish have a pair of compound eyes located on the front of their head. Each compound eye is made up of numerous tiny, individual units called ommatidia. These ommatidia work together to provide crayfish with a wide-angle view and the ability to detect movement, light intensity, and shapes. The compound eyes of crayfish allow them to navigate their surroundings, find food, and detect potential predators.

2. Antennules (First Antennae): Antennules are sensory appendages located on the front of the crayfish's head, near the compound eyes. They are more anterior than the second antennae, or antennae. Antennules are covered with sensory hairs (setae) that detect various chemical and mechanical stimuli in the water. These sense organs help crayfish detect chemicals released by food, identify potential mates, sense water currents, and respond to changes in the environment.