👉 Simprulidos are a type of mollusk that lay their eggs on other mollusk shells, often in order to protect them from predators and parasites. They have a hard exoskeleton with many small holes or pores for air circulation, allowing them to efficiently capture food. Simprulidos are also known for their ability to change color to blend in with their surroundings, which can make them difficult to spot but very effective at capturing prey.