We did our annual clean-out of our Koi pond today, giving me a chance to get my hands on Blutarsky, the bass I introduced to it last spring.
When I caught him & added him to our pond, Blutarsky was just over 12" long and weighed 1 lb., 2 oz. After nearly a year of a steady diet of goldfish, nightcrawlers and any other critters my kids feed him, he is now 15" long and a hefty 3 lbs, 1 oz. (see picture below). He is a very solid fish, just real thick throughout as opposed to a pot belly. His girth is an amazing (to me) 14", which explains why he weighs a pound or so more than most other fish his size. I am guessing that the small size of the koi pond may limit the length he grows to, but not necessarily the weight.
I also was amazed at how his coloring has changed. He is now a very dark fish, matching the bottom of the pond pretty well. He spends most of his time under a few lily pads, but even that shade hasn't stopped him from getting quite the suntan.
One interesting thing that occurred was about 4 hours after we refilled the pond and reintroduced the fish. I tossed some pellets in & the koi as usual started swarming the surface to eat. I flipped a couple of nightcrawlers towards Blutarsky & he completely ignored them. The sank right past his nose & he made no movement to eat them. This is a fish that once tried to eat a ping pong ball!! Either he is very ticked off about his home being disturbed or he doesn't handle the movement out & back into the pond as well as the koi do and is stressed. I am guessing the latter and it opened my eyes a little as to how environmental changes can just shut down a bass bite out on a lake or river.