1. Invasive Tunicates

Didemnum vexillum. at Shilshole Bay in Seattle, WA

Two Didemnum patches were found by Rhoda Green near the boat launch north of Shilshole Bay marina in Seattle on the North side of this wall in Sept 2006. The patches are found about 120ft from the start of the pier on the shore. They are in 11 ft Mean Lower Low tide. The rest of the wall as well as the entire south side of this wall had no other Didemnum patches. In March 2007, the patches appear not to have grown much, if at all, in 6 months time. Most of the following photos by Janna Nichols and may be used with permission: pnwfishlady@comcast.net
Read More
3/23/07 - Valerie shines her dive light on a large patch of Didemnum at Shilshole. - Photo by Janna Nichols
14 / 29

3/23/07 - Valerie shines her dive light on a large patch of Didemnum at Shilshole. - Photo by Janna Nichols

Didemnum vexillum

  • March 2007: Patch #1 was about 3 feet wide, and had grown onto the underside of the wooden boards, and is about 1" up the other side. It does not appear to have grown much, if at all, from when it was first sighted by Rhoda Green in Sept of 2006. - Photo by Janna Nichols
  • March 2007: Patch #1 closeup. White spicules are not very apparent on this shot. - Photo by Janna Nichols
  • March 2007: Patch #1 showing the 'drippiness' near the bottom. - Photo by Janna Nichols
  • March 2007: Patch #1 showing the channeling and details. - Photo by Janna Nichols
  • March 2007: Another view of Patch #1. - Photo by Janna Nichols
  • Patch #2 is to the left of Patch #1, on the next panel over on the wall, and up a bit higher. This patch was strange because it was very loose, and didn't appear to be very attached to the wall, unlike Patch #1. Size was about 2 feet in diameter. - Photo by Janna Nichols
  • March 2007: Patch #2 showing closeup details - Photo by Janna Nichols
  • March 2007: More detailed closeups of Patch #2. This shows channeling and white spicules well. - Photo by Janna Nichols
  • March 2007 - I carefully removed Patch #2 since it was so loose, and put it in a ziploc bag. Here it is in the parking lot. The hole in the center is where the Plumose anemone was attached. There were two Scalyhead sculpins living under the patch of Didemnum. It shrunk a lot once out of the water.  - Photo by Janna Nichols
  • March 2007: Patch #1 - Photo by Janna Nichols
  • March 2007: Patch #1 - Photo by Janna Nichols
  • March 2007: Patch #1 - Photo by Janna Nichols
  • March 2007: Patch #1- Photo by Janna Nichols
  • 3/23/07 - Valerie shines her dive light on a large patch of Didemnum at Shilshole. - Photo by Janna Nichols
  • 3/23/07 - Valerie gathers the removed Didemnum into ziploc bags and puts those into her mesh goody bag. - Photo by Janna Nichols
  • 3/23/07 - Didemnum patch partially removed. - Photo by Janna Nichols
  • 3/23/07 - The 'after' shot of Didemnum removed. The Plumose anemones were left intact.  - Photo by Janna Nichols
  • 3/23/07 - Rhoda looks on another patch of Didemnum before removal. - Photo by Janna Nichols
  • 3/23/07 - 3rd patch of Didemnum at Shilshole before removal. - Photo by Janna Nichols
  • 3/23/07 - More of the 3rd patch of Didemnum at Shilshole before removal. - Photo by Janna Nichols
  • No Comments
  • Photo Sharing
  • About SmugMug
  • Browse Photos
  • Prints & Gifts
  • Terms
  • Privacy
  • Contact
  • Owner Log In
© 2023 SmugMug, Inc.