Despite appearing interesting and being rarely found in the shop, some may consider Bilaterus heads overpriced for what they are able to do for a player's virtual tank. Unlike Mini-Sylvesters that mature after enough days with proper feeding, Bilaterus heads do not have any stages of growth, removing any possible profits from resale or increasing the worth of their shell drops. Bilaterus Heads aren't very appealing in terms of money spent as it takes 10,000 shells to purchase one. Otherwise, Bilaterus heads make for interesting curiosities or as a novelty fish.