I thought the same. LOL
Like me, @realtreebivvy returns the fish to the water. That alone gets my respect in Australia, where carp are usually left by gits to rot on the banks. One of these bigguns rotting down would sure pong up an area!
Just a thought though, @minismallholding might appreciate some buried a couple of foot deep in the vege patch, and always put a couple beneath a Corn patch or sunflowers. As the seed grows, the fish gets worked on by the worms and such and by the time the roots get into it it is all sorts of goodness for the plants. you will never see flowers or seed as healthy and well set.
Works well beneath other plants which like a nutrient boost later in the growing season before flowering too.
We have chicken giblets and remains for burying under long term planting areas - we have over 30 chickens and probably 20 chicks at the moment, and around half a dozen ready to start crowing. We tend to do around 2 chickens per week, in fact i did 2 yesterday... A couple of carp around 4-5lb are boiled up whole for the chickens around once per week... they go mad for them.
Try chucking a few mid size carp into a 40 gallon drum and filling it about 2/3 with water. Leave a gaseous area above the water and put the lid on. Secure the lid. Swish it about once a month by taking the top and swirling the drum. In a few months, after allowing it to brew good and proper, tap it, into a watering can, and dilute it about 10/1 parts water/carp brew.
Don't splash yourself, it is a smell you will never forget.