Craig Evans has been fishing in Wales for seven years. The other day, he shared a frightening snapshot of a lamprey. The toothed parasite about 60 cm long and weighed almost a kilogram.
"I found this dead sea lamprey while fishing for trout in river of West Wales. These wonders of nature spawn in fresh water, feed on tiny algae and microorganisms until they migrate to sea to catch bigger prey," said Craig Evans.
Sea lampreys have been around for 340 million years, can grow up to 60 cm in length. They attach themselves to fish and feed on its flesh.
Ancient parasites, also called "vampire fish", live not for long. They spawn in May-June and die shortly thereafter, in just a few days.
Lampreys can only swim in fast waters where there is no barriers. Most often found off the coast of North America and Europe.
"The only animals that can eat them are otters will only bite off a few inches of their tail," the fisherman added.
Evans, who is always accompanied by his faithful dog Lew, says that these ancient creatures are an indicator of a healthy ecosystems, but recognizes that they are similar to creatures from science fiction film.
In some countries, including Portugal, lamprey considered a delicacy, reminiscent of the taste of eel. The British admitted that a few years ago I tried "weak watery flesh" and no longer wants.