Octopus

A hours walk to the Crete Aquarium which is located in Gournes and is also known as Thalassokosmos, meaning Sea World.
Crete Aquarium has more than 200 different species of fish of the Mediterranean.
It exhibits many local species varying from small fish, hippocampus, medusas, etc. up to sharks. All species come from the Mediterranean sea.

No giant Octopus though!