A submarine vehicle I designed while working on Futuredude Entertainment film and television projects. My idea here was that it could radically change its aspect/orientation to function in a variety of undersea utility roles. The loops that look like large handholds are exactly that - their purpose is to tow divers along when needed. See commentary with images below.
Generic configuration, could serve any number of functions involving tool usage, such as cutting, welding, or retrieving samples from a relatively vertical surface.
Traveling configuration, optimized for maximum visibility and comfortable towing for a maximum possible number of attached divers.
And my personal favorite, the "sea bottom science" configuration. Optimized for maximum visibility of the bottom while maneuvering without disturbing the sea bottom.