Pycnopodia helianthoides
(The Sunflower Star)
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Pycnopodia helianthoides

Pycnopodia can be found to be up to 1 m. in diameter (Kozloff 1973)

Identification
Pycnopodia can range from purple to orange, with a large central disc and a number of rays. This individual was found subtidally at Fox Island, Wa and has 19 rays.

Feeding
Pycnopodia is a predator. It typically will feed on bivalve molluscs, but will also scavenge for dead fish (Kozloff 1973). Experiments (Brewer and Konar 2005) show that Pycnopodia responds to chemical signals that are released from damaged prey and they will chose damaged prey over live prey.
Pycnopodia helianthoides found at Fox Island, Wa





Literature Cited

Kozloff, E.N. 1973. Seashore Life of the Northern Pacific Coast. University of Washington Press: Seattle.

Brewer, R. and Konar, B. 2005. Chemosensory responses and foraging behavior of the seastar Pycnopodia helianthoides. Marine Biology 147(3): 789-795.


This webpage is part of the UWT Marine Ecology 2007 Class Project