F. quadrangularis’s appearance is often described as feather-like. More specifically, they look like a quill sticking in … See more

The tall sea pen can be found globally. They are most commonly found in sea lochs and open waters of the northwest coast of Scotland, mainly found with a depth below 20m to 2000m. They have a patchy distribution … See more

The tall sea pan is dioecious, which means that they have the male and females reproductive organs in separate individuals. The females will develop one oocyte each time throughout the year. With a sex ratio of 1:1 of male… See more

Sea pens are home to many secondary polyps that are either specialized in either feeding or water intake. They are associated with the brittle star Asteronyx lovenii, and their colonis have been observed a… See more

The greatest threat to the survival of F. quadrangularis colonies is demersal fishing activities. This species has very limited distribution that it is restricted to the deep basins, sensitivity to bottom fishing activities, a… See more