Nudibranch, Cadlina luteomarginata, Monterey, California

Yellow-marginate nudibranch, Cadlina luteomarginata, Monterey Peninsula, California

Nudibranch on calcareous coralline algae, Hermissenda crassicornis, Monterey, California

Opalescent nudibranch, Hermissenda crassicornis, Monterey Peninsula, California. Nudibranch on calcareous coralline algae.

Nudibranch, Rose Atoll National Wildlife Sanctuary

Nudibranch, Rose Atoll National Wildlife Sanctuary

California sea cucumber.  Sea cucumbers are related to sea stars and sea urchins. The sharp looking spines are soft to the touch and disappear into the skin when disturbed. If this visual defense doesnt work, the sea cucumber will expel its respiratory system. When this occurs in the wild it can regrow the lost organs, Parastichopus californicus

California sea cucumber, Parastichopus californicus. Sea cucumbers are related to sea stars and sea urchins. The sharp looking spines are soft to the touch and disappear into the skin when disturbed. If this visual defense doesnt work, the sea cucumber will expel its respiratory system. When this occurs in the wild it can regrow the lost organs.

Pelagic opisthobranch or pteropod (wing foot), open ocean, Corolla calceola, San Diego, California

The sea butterfly (Carolla calceola) is also known as a pteropod (wing foot). It is a truly planktonic opisthobranch that, since it is a bit negatively bouyant, must swim with its single pair of wings. Open ocean, California/Mexico.

Spanish shawl  nudibranch, Flabellina iodinea

Flabellina iodinea, Catalina Island, California, Spanish shawl nudibranch.

Nudibranch, Dendronotus albus, San Miguel Island

Dendronotus albus, San Miguel Island, California.

Nudibranch, Mexichromis porterae, San Miguel Island

Mexichromis porterae, San Miguel Island, California.

Spanish shawl  nudibranch, Flabellina iodinea, Santa Cruz Island

Flabellina iodinea, Spanish shawl nudibranch, Santa Cruz Island, California.

Nudibranch egg mass, Monterey, California

Nudibranch egg mass, Monterey, California.

Nudibranch egg mass, Monterey, California

Nudibranch egg mass, Monterey, California.

Nudibranch egg mass, San Clemente Island

Nudibranch egg mass, San Clemente Island, California.

Nudibranch, Triopha catalinae, San Miguel Island

Triopha catalinae, Clown nudibranch, San Miguel Island, California.

Nudibranch, Islas San Benito, Tambja eliora, San Benito Islands (Islas San Benito)

Tambja eliora, San Benito Islands, Mexico.

Aeolid nudibranch, Flabellina trilineata, San Miguel Island

Aeolid nudibranch, San Miguel Island, California.