Zanders are a type of fish.
Like all types of fish, each zander gives one fish fillet when caught.
Zanders can be caught in medium and small circles and therefore are harder to catch.
See Fishing List for more detailed information.
Zanders in the fishing book
The zander is on page 17 of the fishing book:
This huge predator is eager to snap up your lure. All the other fish will cheer if you manage to reel him in!