Mermaids

Mermaids is the third episode of Season 2, and the twenty-ninth episode overall.

Synopsis
"Mermaids don't exist, right? Well, if that's true, then what's that mermaid-shaped thing swimming outside the Aronnax? Ant is determined to find out, even when pirates get in his way."

Trivia

 * This is the only time for a few things on the Mimic Knight
 * It's the only time the Mimic Knight is seen with purple body color
 * It's also the only time the Mimic Knight is seen with yellow arms.
 * This is the first time Professor Fiction and Hammerhead appear in the same episode.
 * The movement of the "bubble" being deployed is straight down unlike in "Treasure of the Islanders" where it was shown being puffed out.
 * It is revealed that Ant has a skylight in his room.
 * Mad Madeline believes in mermaids.