They are as good frozen, as they are fresh off the tree. Catalpa Worms come from the Catalpa tree mostly in the southern regions of the country. These worms infest the tree and eat the leaves several times a year. Some people consider them as pests to the environment, but fisherman will search far and wide to get these prize catfish attractors. I have had fisherman travel from other states to get this legendary catfish bait. If anyone tells you they don't work, they aren't fishing with them properly. Just here in our store we have had fishermen buy a dozen Catalpa's and catch up to 30 catfish. Then turn around and buy 2-5 more dozen for future fishing trips. Catfish have over 140 taste and smell receptors, when Bass only a few dozen. It's the scent of the juices from the catalpa that make them so appealing to Catfish. The great thing about Catalpa's is that they can be frozen and used when needed. The Catalpa keeps it's freshness even in a frozen state. When their cut and fished on the bottom catfish go into a feeding frenzy. So stock your freezer up with some of the best cat fishing bait around. One of the biggest misconceptions is that people think of the catalpa as a worm instead of bait. Catfish eat what taste good not what wiggles, the Catalpa tastes good to the catfish and that's why they work. So if your ordering them don't expect them to come back to life, treat them as if they are a dough bait and they will catch catfish.