LIttle O was resting in the burbs when Barnacle Billie swam over for an encounter:

They held at face to face for a fair amount of time.

Ultimately Little O came up mid column.

She then went back down to the reef:

And back over to Billie where they circled each other off the reef:

Little O broke it off and came up for a surface interval:

O returned to the reef and settled down in the "tunnel":

Billie remained where O had left her and settled in for a rest:

On the main reef, Rocket Girl was foraging:

Up for air: