They swam just as butterflies fly, with a darting, jerky motion, and called a merry "Good morning!" to the mermaids as they passed.
"These butterfly fish are remarkably active," said the Princess, "and their quick motions protect them from their enemies.

We like to meet them; they are always so gay and good-natured." "Why, so am I!" cried a sharp voice just beside them, and they all paused to discover what creature had spoken to them.
"Take care," said Clia in a low voice.

"It's an octopus." Trot looked eagerly around.

A long, brown arm stretched across their way in front and another just behind them, but that did not worry her.

The octopus himself came slowly sliding up to them and proved to be well worth looking at.