Scientists stunned as rare blue fungus resurfaces after 50 years
01 Feb 2026

A rare species of blue fungus has been spotted on the Isle of Man for the first time in over 50 years.

The Terana caerulea, or Cobalt Crust, was discovered in Onchan on the island's east coast.

Typically found on dead wood and tree branches in warm, moist forests of southern England, this unique fungus plays a key role in decomposing organic matter.

It is also used to create an antibiotic for treating infections like strep throat and scarlet fever.

Importance of cobalt crust
Ecological significance

Liz Charter, the founder of the Isle of Man Fungus Group, emphasized the importance of fungi like Cobalt Crust in our environment.

"We need lots of different types of fungi as they're an important part in our environment," she said.

These organisms play a major role in decomposing organic matter such as dead flies or sheep horns, wood and plant materials.

Three sightings this year
Rare finds

Charter revealed that there have been three sightings of the rare Cobalt Crust this year.

"We're at the north end of its distributions on the British Isles and it's really not that common in Britain," she said.

The fungus grows on organic matter, returning nutrients to the soil as part of "nature's recycling."

Despite being first recorded in the 16th century by French naturalist Jean-Baptiste Lamarck, little is known about how this species is transported.