Nobody noticed that Applejack was diving nearby. Being the strong, athletic girl she is, she enjoys taking free dives to collect seashells. Rainbow and Rarity notice her and her reactions are of the maximum surprise. Rarity thinks Applejack can save her, while Rainbow sees another friend to share the curse with. She is starting to have fun with this.

Rarity: Applejack!!! Darling! You have to help me! Rainbow Dash is not on her right mind today! She… ruined my legs… Help me! Or run for help! Or Run for help while saving me!…. By the way… that swimsuit really shows off your apple-bottom…
Rainbow: Well, well, look at what the tide brought us today! Applejack, don’t you like our hyper-realistic mermaid “costumes”. I just finished tailoring Rarity’s. I can say it is “skin-tight” and fairly permanent. Would you like to have one too?
Applejack: *thinking for herself* Why in the tarnation are my friends talking underwater without any problem, like… drowning? And why are they disguised as mermaids? And what are those cuts around Rarity’s neck? And since when does Rainbow use giant earrings? They look like earfins… Wait a second… did the angler in Rarity’s head just sprang up straight?