Crayfish External Anatomy

Crayfish are freshwater crustaceans in the order ‘decapod’ meaning ten+foot. As we finish our journey through arthropods, we notice many similarities between them. The exoskeleton, jointed legs, segmented body, antennae, and carapace are just a few. The students observed both a preserved specimen and a live marbled crayfish. They followed a lab procedure sheet that guided them through all the characteristics that the crayfish uses for obtaining energy, protection from predators and reproduction. The movement of the swimmerets and maxillipeds (mouth parts) were easy to observe on the young crayfish in the beaker.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s