The others are just two-colored, and as mentioned in the list, the one with the red dot is a tancho, or red crane

In the end, they're all simply goldfish, so it's not necessary to know all the names and terms used in connection with their looks and colors unless you just want to sound like a geek x'D
It takes some time to figure them all out if there aren't clear pictures, and I might not have added enough examples on the list...