On a US Navy s submariners pin, why are those two fish called dolphins, when they dont look like flipper at all? .?

There are many species of dolphins. Flipper was the species Tursiops truncatus, common bottlenose dolphin.

There are mammals called dolphins and fish called dolphins. The badge looks like the fish called dolphins.

Fun Fact for you....Sailors don't really look like Squids either...

Dolphins are a widely distributed and diverse group of aquatic mammals. They are an informal grouping within the order Cetacea, excluding whales and porpoises, so to zoologists the grouping is paraphyletic. The dolphins comprise the extant families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the new world river dolphins), and Pontoporiidae (the brackish dolphins), and the extinct Lipotidae (baiji or Chinese river dolphin). There are 40 extant species of dolphins. Dolphins, alongside other cetaceans, belong to the clade Cetartiodactyla with even-toed ungulates. Cetaceans' closest living relatives are the hippopotamuses, having diverged about 40 million years ago.

Dolphins range in size from the 1.7 m (5.6 ft) long and 50 kg (110 lb) Maui's dolphin to the 9.5 m (31 ft) and 10 t (11 short tons) killer whale

https://en.wikipedia.org/wiki/Dolphin

- and technically speaking it is a Warfare Badge or Insignia, not just a pin, because there are soft sew on versions for working uniforms too.

http://www.public.navy.mil/bupers-npc/support/unif...

Dorado and Mahi Mahi are the same fish, not mammals. There are many species of Dolphins and Porpoises.

ok sailor

Dolphins are also a tropical fish

Dolphins are in fact what restaurants call "Mahi Mahi." They're fish, not mammals. Flipper was a porpoise.

Dolphins are marine mammals, specifically odontocete cetaceans. This means they are toothed members of the whale family. Since they are mammals, dolphins have live births, breath air and control the temperature of their blood (this is called being "warm blooded" or an endotherm). Dolphin fish (also called mahi-mahi) are bony fish. Because of this, they reproduce by laying eggs, breath water and cannot control their body temperature well (so they are cold-blooded or exothermic).

Asinine Question of the day already

A