Zygaena tudes (Sphyrna tudes) is the hammer-headed shark, readily distinguished by the curious shape of its head. As its popular name indicates, the outline of the front part of the body of this shark resembles that of a hammer, the head being markedly hammer-like and produced sideways into two lateral lobes. The eyes are placed at the lateral extremities of these lobes and the nostrils are placed on its front border. The Tamil name, “komban sorrah”, meaning “horned shark” alludes to the resemblance of the lateral lobes of the head to a pair of horns. It is commonly seen in fish markets, and its liver oil has great market value, as it is very rich in vitamin A content.