Aquatic Fashion Illustration in Charcoal

Prompt:

Fashion Illustration Charcoal Sketch a picture with aquatic environment where mammals and fish form an organic world; these creatures can even be merged with human beings to become new creatures; the picture also shows each creature's affective world, and their enjoyable relationship with one another; try to make the layout of the picture in the shape of a rectangle with a blank middle part which is also a rectangle.