What is a key characteristic of manual fly reels?

A key characteristic of manual fly reels is that the spool is turned by the reel handle to take up line. This means that the angler has complete control over the retrieval of the line, allowing for precision and adaptability while casting and retrieving. Manual fly reels are designed to provide a tactile and hands-on fishing experience, where the angler actively engages with the equipment to manipulate the line and manage tension.

The other options do not accurately describe manual fly reels. For instance, automatic reeling in would suggest a different type of reel, known as an automatic or semi-automatic reel, which is not the case for manual reels. Additionally, while fly fishing can be used for various fish sizes, manual fly reels are not exclusively designed for large fish, and they can be effective for a range of species. Lastly, the material of the reel can vary greatly; while some are made of plastic, many high-quality manual fly reels are constructed from aluminum or other durable metals for added strength and longevity.