GEORGE TOWN: Two dolphins have been found dead at the Tanjung Bungah beachfront in less than a week.
The first death was reported on Dec 29 while another death was reported today.
The double deaths have raised concern among environmentalists, who have called for a thorough probe into the incident.
Sahabat Alam Malaysia said the deaths of the mammals should be investigated.
The non-governmental organisation said that the earlier death was reported to the Fisheries Department but the department did not take any follow-up action.
"They just buried it instead of conducting an autopsy.
“We would not know the cause of death unless the department or the Fisheries Research Institute of Malaysia carries out a post-mortem," said a SAM representative.
The death of the mammals was first posted in the Pulau Parasit Facebook page.
According to the page, the dead dolphins were of the Indo-Pacific Humpback species.
Dolphins are a rare sight in Penang waters, but have been spotted around the island in recent weeks.
A local claimed to have seen several dolphins in the waters off Teluk Bahang on Christmas Eve, while another allegedly spotted a couple of dolphins near the Penang Bridge last Saturday.