Pyrosomes dot the landscape near Cannon Beach as research into their impact on ecosystems continues.

Pyrosomes dot the landscape near Cannon Beach as research into their impact on ecosystems continues.

Colin Murphey/The Daily Astorian

The pyrosome invasion continues.

Thousands of the strange, pickle-shaped gelatinous creatures continue to wash up on Clatsop County beaches months after ocean biologists first recorded masses of them drifting offshore during a research cruise in the spring.

Very little is known about pyrosomes or why they have shown up in force now. Research into what they eat and what it means to have them in the ecosystem is ongoing.

Pyrosomes have been seen in Oregon and Washington state waters before but never in such large numbers. This spring, there were enough floating in the water column to clog up fishing gear on commercial shrimp boats.

Read the whole story at the Daily Astorian.