It's an Animal??(!)

Ostrich-plume hydroid? Aglaophenia spp.?? Phylum Cnidaria, Class Hydrozoa, Subcl. Leptothecata, Order Conica, Family Aglaopheniidae.

Thank-you Beachwatchers, SeaNet, Oceanlight.

Oh drat, I'm going to have to go back to the coast a.s.a.p. to make sure. I wonder where the hand lens is...

Same as in post below. Now suspected of being an Ostrich-plume Hydroid. (Click for larger image.)