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

This image is a drawing, akin to what might be seen in a tapestry or a fresco, though much simpler in style. It depicts a collection of various sea creatures, rendered in an elementary, almost child-like manner. Included are five creatures, each distinct in shape and form.To begin, there is a large fish with pronounced scales and a visible eye, occupying the central part of the image. Above and to the left of this fish, floats a creature resembling a caterpillar, complete with tiny legs and feelers, not typical of marine life, suggesting a touch of whimsical or fantastical interpretation. Beside this caterpillar is a snail, its shell spiraling inward, a common sight in gardens or wet stone walls.Beneath the central fish, one finds a mollusk with a conical shell, perhaps a whelk, known for its hard, protective casing and enjoyed by some as a delicacy. To its right, there''s another small fish, stout with a round body and detailed with lines which might suggest fins or scales.At the bottom of the drawing stretches a long, slender creature, likely an eel, with a smooth body and simple facial features marked only by an eye and a mouth.The background of this tapestry-like image is undulating lines, possibly representing water, giving each creature the appearance of swimming or floating in a large body of water. This could be seen as a whimsical representation to someone from the Middle Ages, reminiscent of illustrations found in illuminated manuscripts where creatures real and imagined often populated the margins.