Studies
Coenobita compressus prefers the odors of foods that they have not recently eaten. The hermit crabs that were exposed to one food for at least 9 hours preferred foods having other odors for the next 6 hours. It is this short-term avoidance of food (like human beings who get bored with the same meals over and over again) that compels the crabs to seek out a wider range of food. This might be advantageous to the hermit crab, possibly through the consumption of a more nutritionally-balanced diet.
Read more about this topic: Ecuadorian Hermit Crab
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