 Presently , the porcupine ray is caught incidentally in trawls , tangle nets , and beach seines . Its skin continues to be highly valued , while the meat and cartilage may also be utilized . In the <unk> Islands and some other places in the Red Sea , its liver is eaten as a seasonal dish . However , the economic importance of this ray is limited by how difficult it is to handle . The multi @-@ species coastal fisheries that catch the porcupine ray are largely unregulated , which seems to have resulted in its dramatic decline or local extinction in the Bay of Bengal , the Gulf of Thailand , and likely elsewhere in its range . Potential additional threats to this species include habitat degradation from coastal development , and depletion of its food supply from overfishing . As a result , the International Union for Conservation of Nature ( IUCN ) has assessed it as Vulnerable . 
