Too much fiber

Unless you simmer it with garlic, herbs, and red wine. Then it's gravy.

You act as though there is only one correct taxonomy. Scientific taxonomy is determined that way - not cultural taxonomy. Different cultures and language groups taxonomize things in their own way. Like if you are speaking a native Botswanan language things are not divided by plant or animal it is sorted into

1. Things you can eat
2. Things that can harm you
3. "Useless" things

Algonquin language distinguishes animate and inanimate but while plants are generally inanimate somethings like feathers are considered animate.

No one is suggesting these taxonomies should be how we categorize things scientifically but at the same time they are not "wrong". Being able to accept multiple taxonomy systems as functionally correct is nessisary for being able to make useful judgements. In English a blackberry is culturally a berry. We harvest and use it as a berry and have named it thusly while botanically it is an aggregate drupe. Something that helps us interpret it as something closer to a stone fruit. Hence calling it a berry is not wrong. Just not fulfilling the requirements of every available taxonomy. People who are obsessed with being "correct" often latch onto scientific taxonomy but there are risks to creating hierarchy where there is only one right answer that flattens nuanced issues.

Is a fish meat? The level of adhereance to a single answer reveals the individual cultural bias of the individual. Respecting more than one answer means you can better empathize and understand where that person comes from.

I hear rhe tails are actually quite tasty cooked up right.