small bottom-dwelling shark found along both Atlantic coasts
any of several small sharks
primitive long-bodied carnivorous freshwater fish with a very long dorsal fin; found in sluggish waters of North America
having a surface free from roughness or bumps or ridges or irregularities
smoothly agreeable and courteous with a degree of sophistication
of the margin of a leaf shape; not broken up into teeth
smooth and unconstrained in movement
lacking obstructions or difficulties
