Could substitute crab, lobster, mussels, even crayfish, with longer cook times. If you elect to use crawfish, be aware that some seafood species can harbor parasites or other disease-causing organisms. Two cases in point are crayfish and crab, which are known to host the parasitic worm (lung fluke) which cause a disease called paragonimiasis. The principle, and only known cause is consumption of undercooked crustaceans.
Using the search string "how long to boil seafood" in your web browser will return articles with cook (boiling) times equal or similar to those below, from most search engines:
| Seafood Type | Minimum Time (minutes) |
|---|---|
| crayfish* | 10 |
| mussels | 15 |
| Crab | 15-20 |
| lobster | 15 |