Hybocodon prolifer

Darryl Mayer I'd like a definite ID on these if possible. I was thinking Oatenpipe Hydroid, Tubularia indivisa, the ones Flaballina lineata munch on before laying their eggs. Loch Sunart, near Strontian.

Marco Faasse Certaily looks like it, but I have never seen the similar Hybocodon prolifer and Ectopleura crocea, so I can't be sure. Ectopleura larynx is different.

David Kipling How would you tell the difference between this and T. larynx from this photo, Dawn? Underwater it's easier, especially if side-by-side (we get both on mooring lines in the Cleddau).

David Kipling lol! Very true, the larynx do grow as nice little bushy mounds. Be ideal ground cover in my garden (and since we're in Wales it's probably wet enough for them to survive, provided I sprinkle a bit of salt around).