Bestbait Spikes (White Maggots) Calliphora Vicina Spikes are the #1 Selling Ice Fishing Bait. They are larvae of the common blowfly. They are great for pan fishing and trout. Maggots are a creamy white with a soft pliable body. In Europe maggots are used to chum an area before fishing. Maggots are shipped in pine shavings and will last 1 month if refrigerated. Maggots must be refrigerated.