National Oceanic and Atmospheric Administration (NOAA) photo of an arrow head of a hunting arrow that killed a dolphin in Orange Beach Alabama

An arrow head of a hunting arrow that killed a dolphin in Orange Beach, Alabama is shown in this National Oceanic and Atmospheric Administration (NOAA) photo released on December 8, 2014. A dolphin was lethally shot by a hunting arrow in the northern Gulf of Mexico, the second violent killing of the protected animal in recent weeks, federal authorities said on Monday. REUTERS/NOAA/Handout (UNITED STATES – Tags: ANIMALS CRIME) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS