Frog

Frog is a Special fish that appears during a "Verdant Vortex" admin event, so it has no fixed zone. The wiki describes it as a small green frog with two legs, two arms and large black eyes.

According to the wiki, it makes for a hard catch because its movement on the bar is erratic, and the Progress Speed modifier it carries appears only as a question mark. As with every Special fish, a Special icon pops above the player's head when it is hooked and a shimmering sound plays.

The page lists no bait, weight, experience, value or catch quip for it, so what is known comes down to the event, the rarity and the erratic movement.