Two porpoises have been washed up on a beach near Borth, mid Wales.
Milford Haven Coastguards found two dead porpoises
Milford Haven Coastguards said they were alerted just before 2010 BST on Saturday.
One porpoise was found on a beach in Wallog and the other at Ynys Las. An expert was sent to the scene to deal with the carcasses.
A marine animal expert has said strong westerly winds could cause more porpoises and other cetaceans to be washed up on the Welsh coast.
Rod Penrose said volunteers hoped to carry out a post mortem examination on the porpoise at Wallog.
But the animal at Ynys Las is so decomposed that they might not be able to do much with it, he said.
The gender and the size of the porpoises have not yet been determined.
On Monday, a rarely-seen 15ft Sowerby beaked whale was treated by the RSPCA after becoming stranded on a beach in mid Wales at Ynys Locktyn, near Llangrannog, Ceredigion.
Rescuers had at first thought the animal was a dolphin.
In total, three whales have been beached at different points on the Welsh coast in the past week.
The biggest whale to be washed up was a mighty fin whale, on mudflats near Newport in south east Wales last Thursday.
The animal, measuring 18.2 metres and weighing 80 tonnes, had died and a huge operation had to be set up to carve the carcass up where it lay and then dispose of it.
Hours after the Sowerby's beaked whale was washed up on Monday, another Sowerby was found a few miles further along the coast at the Parrog in Newport, Pembrokeshire.
This second animal could not be saved, and a post-mortem examination was carried out at London Zoo.