Giant barbs are a type of fish.
Like all types of fish, each giant barb gives one fish fillet when caught.
Catching giant barbs
Giant barbs can be caught in medium and small circles and therefore are harder to catch.
See Fishing List for more detailed information.
Giant barbs in the fishing book
The giant barb is on page 17 of the fishing book:
Don't get fresh with Barb! She's the biggest fish in the pond, and has an attitude to match.