What is in this image? Describe it as if you were explaining it to someone from the 15th century.

The image depicts a scene one might find by the seashore. On the left, there is a large creature that might remind you of a crab. It has round, bulbous eyes perched on top of its head and large claws that appear suitable for snapping. These claws look powerful, potentially used for defense or capturing prey.To the right, there is an object resembling a large sea snail’s shell, though it is segmented in a way that differs from the familiar whorled, continuous structure of snail shells. This segmented shell appears open, possibly revealing it as a habitat or protective cover for another sea creature, reminiscing a clam''s shell but with distinct, rigid sections.The environment around these creatures suggests sandy flats that might be exposed during low tide, as there are variously shallow pools and rivulets of water depicted around them. The setting is tranquil yet holds the curiosity of marine life and their adaptations to their habitat.