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The key to the exhibition, according the gallery, is knowing that Alexa also responded to Ms. Baga using the name “Mollusca.”

As Mark Siddall, curator of the Annelida and Mollusca collections, opens the tank with the help of others, he warns us to take a step back.

The octopus’s position in the Mollusca phylum illustrates evolution at its most spectacular, Hochner says.

Scientists recognize eight major phyla to describe most common animals: Porifera, Cnidaria, Platyhelminthes, Annelida, Mollusca, Arthropoda, Echinodermata and Chordata.

Rather, it belongs to the phylum Mollusca, along with the squid, octopus, clam and snail.