Is it a sin to eat dolphin dangerous tuna on 3/25?

[newenglandsun]

So during the Great Fast, some of us go for strict fasting practices that say no fish but permit fish without a backbone (octopus and squid and kraken 🦑) and shellfish like shrimp, lobster, crawfish, and crab are okay (🦐 🦀 (lobster unpictured because shy)).

On a Feast Day as joyous as the Annunciation though (3/25) we are permitted to eat fish. Obviously, tuna is a fish. Many cans of tuna are labeled as "dolphin safe" to ensure the eater knows he is eating tuna only. But what if someone purchased a can of tuna without the label. Instead, maybe the label read, "dolphin dangerous" indicating an unfortunate dolphin , maybe from Miami, was ensnared and then grinded into the can like the tuna? Would that be sinful to eat or is dolphin considered a fish?

[jovan66102]

You know, I've never thought about it, but historically, in the West, several aquatic creature were considered 'not meat' and eaten during Lent, including beavers and frogs, the latter of which were called in France Alouettes de Carême (Lenten larks).

And alligator is definitely acceptable for Latins, at least in the Archdiocese of New Orleans.

Alligator OK to eat on Lenten Fridays, archbishop clarifies

[Jeeter]

Instead, maybe the label read, "dolphin dangerous" indicating an unfortunate dolphin , maybe from Miami, was ensnared and then grinded into the can like the tuna?

The "dolphin safe" label refers to the method of catching, not processing.  Basically, dolphins and tuna aren't circled in nets together.  No, dolphin-not-safe tuna doesn't contain dolphin meat.

Would that be sinful to eat or is dolphin considered a fish?

I don't think so, since a sin requires knowledge. In essence, if it's labelled fish, the responsible authorities say it's fish, and you have no reason to doubt that it's fish, if it turns out to be not fish. It's not on you.

Caveat: I'm not a theologian, I don't self-identify as one, nor did I stay in a Holiday Inn Express recently.

[benedicite]

When I was a child I remember porpoise being on the menu in some restaurants.

[jovan66102]

Can I Eat That? A Guide to Weird Lenten Foods