Theory: symbiotic relationship. mermaids produce excessive milk at all life stages so the starfish drink it making the starfish well feed and the mermaid milked (which is important in over production of milk)
I always figured mermaids would be more like cetaceans than fish. Having scales on their tails would be inaccurate, but breathing air, growing hair, and having a horizontal tail fluke are all in-line with mammals/cetaceans.
Not to mention, it would mean mermaids would have regular genitals (albeit hidden inside a genital fold, to increase hydrodynamics.) It would also mean they’d have normal placental pregnancies.
And, I suppose, to keep Disney's G to PG rating. Can't really market a movie to kids and show animated titties, now can you? Also, she's only 16, so there's that.
Then again, why is Ariel only 16 to begin with? I get that she's a teenager in the source material, but it's not like Disney has never taken artistic liberties. And it's not like 18 year olds don't deal with power struggles with their parents. I was having power struggles with mine at 22.
Well, I just found out that manatee mammaries are located in their armpits, so I think we're going to need to pull up the drawing board on this one. Seems like mermaids need a total do over!
I feel like the classic image the mermaid in my head is clamshells as a bra. However, my extensive mermaid knowledge consists of: ariel, the concept of the undine (which I have never seen depicted and I’m not sure is a mermaid actually, is this something that encompasses mermaids technically? Not really my forte), and decerto, who I have also never seen depicted