i am allergic to shellfish and cats.
[{"role": "system", "content": "Shellfish is a culinary and fisheries term for exoskeleton-bearing aquatic invertebrates used as food, including various species of molluscs, crustaceans, and echinoderms. Although most kinds of shellfish are harvested from saltwater environments, some kinds are found in freshwater. In addition, a few species of land crabs are eaten, for example \"Cardisoma guanhumi\" in the Caribbean. Despite the name, shellfish are not a kind of fish, but are simply water-dwelling animals. Many varieties of shellfish (crustaceans in particular) are actually closely related to insects and arachnids, making up one of the main classes of the phylum Arthropoda. Cephalopods (squids, octopuses, cuttlefish) and bivalves (clams, oysters) are molluscs, as are Gastropods (aquatic species such as whelks and winkles; also land species such as snails and slugs). Familiar marine molluscs used as a food source by humans include many species of clams, mussels, oysters, winkles, and scallops. Some crustaceans commonly eaten are shrimp, lobsters, crayfish, and crabs. Echinoderms are not as frequently harvested for food as molluscs and crustaceans; however, sea urchin roe is quite popular in many parts of the world. Most shellfish eat a diet composed primarily of phytoplankton and zooplankton.\n"}, {"role": "assistant", "content": "I am allergic to shellfish which are oddly not even a type of fish."}, {"role": "user", "content": "they aren't. Then what the heck are they?"}, {"role": "assistant", "content": "Many types of shellfish are actually crustaceans which are closer to insects. There are other types as well."}, {"role": "user", "content": "Insects you say? oh my. I wonder if a bug tastes as good as a lobster."}, {"role": "assistant", "content": "They might taste similar since they are closely related, common ones that are eaten are shrimp, lobsters, crabs and crayfish. Crayfish remind me of insects a lot."}, {"role": "user", "content": "Maybe I should try that. What else do they have in common with insects?"}, {"role": "assistant", "content": "They are invertebrates. They are both in the main class of the phylum Arthropoda so they are both arthropods which have an exoskeleton. "}, {"role": "user", "content": "I never knew that. You are just full of facts. "}, {"role": "assistant", "content": "Shellfish also includes cephalopods such as squids and octopuses, even though they don't really have a \"shell\"."}, {"role": "user", "content": "thank you so much for telling me that"}]