Continuity mistake: When Percy is tossed though the air by the Cyclops the fleece disappears from Percy's hand, but reappears when he lands on the table. (01:18:25)
Continuity mistake: In the taxi cab where Percy, Annabeth, and Grover went in to the escape camp with the three gray witches, Percy is seen putting on his seat belt. But when the taxi splits in two, Percy hangs in the middle of the two halves and the seatbelt is not in place.
Continuity mistake: When Percy, Annabeth, and Tyson are in the sea after fleeing from Luke, in different shots, the sky changes between clear and mostly cloudy.
Answer: According to Riordan Wiki on Fandom, they are the Grey sisters, Anger (Deino), Tempest (Persis or Perso), and Wasp (Pemphredo). They are the daughters of minor sea gods.
raywest ★