When the crab sinks slow it's good. I find sometimes if I use a live crab and let it sink to the bottom the crab will look for somewhere to hide, maybe in the sand or under a rock. Then I wonder why I don't catch anything or why my line gets snagged haha. If you use a crab beneath a float then he has nowhere to hide and the fish can easily see & hear him in his desperation to escape haha. Nice catch!