In fact it is the underside of a young Thornback ray, pushing itself up the inside of an aquarium.
What appear to be eyes are gill slits, part of the animal's mechanism for breathing. Its real eyes are on top of its body.
Children visiting the Blue Reef Aquarium at Southsea, Hampshire, have remarked on the 5in fish's resemblance to The Last Human, the Doctor Who creature (inset) given voice by Zoe Wanamaker.
The month-old ray is one of 12 hatched from eggs known as "mermaid's purses" as part of a breeding programme.
"Their faces are very distinctive, especially the apparent smile," said a Blue Reef spokesman.
Thornbacks are the most common ray in British waters and can grow up to 4ft in length. Their backs are covered with spines.
The baby rays were all born as part of a captive breeding programme at the aquarium.
They are currently being looked after in a special nursery tank - but once large enough, will join adult Thornbacks and a variety of sharks in a huge, open-top pool.
A Blue Reef spokesman said the babies were proving very popular with visitors.
He said: "Their faces are very distinctive, especially the apparent smile. "Some people have likened them to an alien or even the 'The Last Human' featured in Doctor Who.
"UK waters are home to up to nine different species including the electric ray and the giant skate which can reach lengths of up to three metres.
"Thornbacks are the most common ray in British waters and can grow up to 1.2 metres in length.
"They are called Thornbacks because their upper body is covered with coarse prickles."
'The Last Human' featured in two episodes of Doctor Who, starring opposite both Christopher Eccleston and current Time Lord David Tennant.
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