Fun fact: If birds are dinosaurs, dolphins are fish.

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@zatnosk "fish" is a category based on common attributes, not lineage

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@zatnosk it's the common name for the clade Dinosauria

@noiob "dinosaur is a clade because it's a clade" is what I'm hearing.

@zatnosk I mean I didn't invent biological categories but they're not arbitrary

@noiob but fish apparently is. Whales used to be considered fish - an old danish word for "whale" is "hvalfisk" = whale fish.

Sorry, I don't want to make it an argument. I know fish isn't a technical biological clade, but it's socially constructed which words get to be considered a clade, when a lot of the words are older than cladistics.

@zatnosk tbh I just like the fact that "fish" is a pretty loosely defined category (that definitely excludes mammals nowadays)

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