She tucked into a cave for a short while:

Rocket Girl foraging:

Barnacle Billie comes up the reef and encounters Rocket Girl

Stills from a video of their encounter:

Billie stops and makes contact with Rocket's reaf flipper:

Rocket Girl rotates and goes cheek to cheek with Barnacle Billie before abruptly backing off and away.

Video of encounter:

Billie proceeds north and up to the surface for air: