There ain 't no craws in most of the palces I fish, plastic craws work.
There ain 't no salamanders ( not lizards, lizards are terrestrial creatures ), water puppies, mud puppies, water dogs ( however you want to call them ) not native ajolotes in most of the places I fish and plastic salamanders ) or lizards also work.
Well, haven 't seen night crawlers swimming or crawling along the bottom of most of the places I fish and have caught fish with soft plastic worms for as long as I can remember.
Frogs, don 't see much of them either where I fish, toads normally only go to the lakes and ponds to lay their eggs during the rainy season but you can 't find toads in lakes on a daily basis, soft plastic frogs also catch fish.
There ain 't no spinnerbaits living in the lakes I fish and spinnerbaits also catch fish.
In-line spinners also catch fish.
A bait doesn 't have to mimic anything a fish eats on a regular basis, the bait only has to move like if it were "alive" and an easy prey in order to catch fish.