| japan | | myoxocephalus polyacanthocephalus | species | 12 | 0 |
| russia | primorsky krai | myoxocephalus polyacanthocephalus | species | 2 | 0 |
| united states | | myoxocephalus polyacanthocephalus | species | 35 | 0 |
| united states | alaska | myoxocephalus polyacanthocephalus | species | 41 | 2 |
| united states | washington | myoxocephalus polyacanthocephalus | species | 4 | 0 |