Aglaophenia pluma

Aglaophenia pluma, the toothed feather hydroid or podded hydroid, is a colonial hydroid in the family Aglaopheniidae and is found worldwide.

It lives from the shore to 120m under water.

[1][2] Toothed feather hydroids are upright colonial hydroids with stems which may grow to 3 cm in total height though the colony may be larger.

They have unbranched yellow stems and reproductive bodies that resemble pine-cones.

[1] This species has a sting which may cause swelling of the affected area in humans.