This is not the first time an octopus has washed up Welsh shores, after two were seen and rescued, while crawling on a Ceredigion beach in 2022.
On another occasion, an octopus was spotted changing colour in footage captured at Menai Bridge beach on Anglesey.
Gareth, a professional photographer from Pembroke, said the low tide at North Beach in Tenby led to a “sense of anticipation” that was soon rewarded.
“I unexpectedly came across a beautiful common octopus,” he said.
“I watched, completely absorbed, as it began to bury itself in the sand, its skin shifting colour and texture in an effortless display of camouflage.”
The octopus “soon vanished from sight, as quietly as it had appeared”, he added.