Oceanography – Squid Dissection
Today the young biologists dissected another creature from the depths of the sea – a squid! Squid are unique molluscs for a variety of reasons. They have an internal shell called a pen that evolved to support their streamlined body plan, allowing faster swimming speeds. Squid are fantastic simmers that move via jet propulsion; they take in water into their mantle and then expel it forcefully through their siphone. Some squid can reach 20 mph! Interestingly, squid have three hearts, allowing them to pump blood and deliver oxygen as quickly as humans do.
Ask your camper: Squid are invertebrates – what does that mean?