In July 2010, it was reported that the spill was "already having a 'devastating' effect on marine life in the Gulf".[203] Damage to the ocean floor especially endangered the Louisiana pancake batfish whose range is entirely contained within the spill-affected area.[204] In March 2012, a definitive link was found between the death of a Gulf coral community and the spill.[205][206][207][208] According to NOAA, a cetacean Unusual Mortality Event (UME) has been recognized since before the spill began, NOAA is investigating possible contributing factors to the ongoing UME from the Deepwater Horizon spill, with the possibility of eventual criminal charges being filed if the spill is shown to be connected.[209] Some estimates are that only 2% of the carcasses of killed mammals have been recovered.[210]