Nor do they have the proper limbs to even try in the first place. [Another pause to catch his breath, then:] At the very least, I can't imagine a dolphin being able to drag itself along the ground effectively with its fins alone.

[Edgeworth next struggles to take a deep breath, then presses his left arm against his side before pushing off the ground with his right to heave himself into a roll. Given his tapered shape, the roll is curved, but the possibility of someone doing that is proven — and the accompanying trail made.]