Metridium senile

f22 @ 1/60s, Kodachrome 64 silde film, ASA:64, Nikonos II w 35mm and Nikon close-up lens, Oceanic flash

Thin white threads known as acontia protruding from the mouth of the sea anemone, Metridium senile. The acontia are lined with stinging nematocysts and are used in defense or paralysis of prey.
Narragansett Bay, Narragansett, Rhode Island