What do crabs and sea cucumbers have in common?

Crabs and sea cucumbers share the common characteristic of being marine animals found in ocean ecosystems. Both are part of the benthic community, living on or near the sea floor and playing essential roles in their habitats. Additionally, they contribute to the nutrient cycle; crabs by scavenging and preying on various organisms, and sea cucumbers by processing sediment and recycling organic matter. Despite their different biological classifications, they both help maintain the health of marine environments.