Ika-Roa resemble giant, flat sharks, reaching lengths of 30 feet long. Their fins are extremely short, and the teeth are flat, perfect for eating shellfish and aquatic debris. They have dark colors, usually of a muddy dark green or brown.
As mentioned before, the diet of an ika-roa consists of shellfish and aquatic debris. They are sometimes preyed on by Kasai rexes.
Many ika-roa have deformities, such as fused teeth, no fins and fused bones. This is believed to be caused by a small gene pool.