That's the way it is here, you get a few cases like this a year. Always the animal is killed and never any exceptions, I doubt he will get 10 years but he will do a bit of time. Not sure how the fine will go. It's not just the actual fish they are worried about but all the pathogens/viruses etc. it could be carrying.
A few years back a woman got an RTC through and had it in her house which apparently was full of tanks, someone tipped off the authorities and after the inevitable raid by the authorities every fish she had was euthanised. I will post a link to the story if I can find it as she had multiple tanks in every room in the house. The police were tripping on how she even had tanks in the bathroom and toilet, said she "seemed obsessed"
You can get big $ for an illegal import fish here if you can get it through customs but if you get caught they will give it to you hard.