a dog with no legs that looks like a fish?

A smooth, certain-colored dog without legs that bears resemblance to a fish due to its elongated, streamlined body shape. Features to note are its glistening, short coat mimicking fish scales, a snout reminiscent of a fish mouth, and eyes on either side of its head like a fish. The dog's form is flat along the underside, similar to a fish's belly, and it tapers to a tail end much like a fish tail would. Imagine this dog in a serene blue setting