
Photo: Steve Morey
The Pacific Ocean appears to under attack by a horde of sea-pickles. The bumpy, translucent, pickle-shaped organisms called pyrosomes are filling fishing nets, clogging hooks and washing up on beaches along the coast of the Pacific Northwest of the US and Canada. They are also befuddling scientists who have no idea why the population of the tube-like organisms has exploded. Pyrosomes are common in the tropics and occasionally appear in more northern Pacific waters, but no one has an explanation of why they have appeared in such large numbers as far north as Alaska.
Pyrosomes are strange creatures, to begin with. They are tunicates, colonies of individual organisms known as zooids that feed off of plankton and other small organisms. In the tropics, they can reach a length of 30 feet and often glow in the dark. The pyrosomes in the Nothern Pacific have been up to two feet long. Continue reading