What is a "tiddler"?

A tiddler is a very small fish, typically less than 6 inches in length. This term is commonly used in the UK, Australia, and New Zealand, and is often used to describe juvenile fish or smaller species that are caught for sport or as bait. Tiddlers can be found in rivers, lakes, and the ocean, and can play an important role in the food chain as prey for larger fish and other predators. While tiddlers may be too small to be of significant commercial value, they can still be important for recreational fishing or as a food source for other wildlife.