Galeorhinus ypresiensis was an extinct hound shark belonging to the same broader family as living school sharks and related triakids. It was probably an active coastal or shelf predator, occupying the space between tiny bottom-dwelling sharks and the larger lamniform hunters.

Its low, asymmetrical cutting teeth suggest a varied diet of fishes and invertebrates. Rather than relying on long piercing teeth, the dentition provided a continuous cutting edge capable of gripping and processing relatively small prey.

The animal is known mainly from teeth, so its precise body proportions and behaviour remain uncertain. Its occurrence in the London Clay shows that hound sharks were already a well-established part of early Eocene marine communities.