Marine Life‎ > ‎California‎ > ‎Invertebrates‎ > ‎

Nudibranchs M-R

MacFarland's Chromodorid

Chromodoris macfarlandi

(1-3,7-8: San Carlos Beach, Monterey / 4: Ship Rock, Santa Catalina Island / 5-6: Golf Ball Drop Off, Santa Cruz Island)

Modest Cadlina

Cadlina modesta

(1-2: Whaler's Cove, Point Lobos / 3: San Carlos Beach, Monterey)

Similar to the yellow-margin cadlina, but without the yellow margin.

Monterey Dorid

Doris montereyensis

(1-3: Whaler's Cove, Point Lobos / 4-5: San Carlos Beach, Monterey / 6: Monterey State Beach, Monterey / 7: Lovers Point, Monterey / 8: Monastery Beach, Carmel-by-the-Sea)

The Monterey dorid has black tubercles (bumps/tentacles) on its back.  The similar Sea Lemon has black on its back, but only yellow tubercles.

Here's a close up image of one of its rhinophores:
(1: San Carlos Beach, Monterey)

Mulliner's Dorid

Peltodoris mullineri

(1-3: Ship Rock, Santa Catalina Island)

Olive's Aeolid

Aeolidiella oliviae

(1-3: Monterey State Beach, Monterey)

Opalescent Nudibranch

Hermissenda opalescens

(1,3,5: Monterey State Beach, Monterey / 2,4,6-7: San Carlos Beach, Monterey / 8: Whaler's Cove, Point Lobos)

Close up of its head:
(1: San Carlos Beach, Monterey)

These ones are tiny, just a few mm long:
(1-2: Monterey State Beach, Monterey)

These are opalescent nudibranch eggs, and nudibranchs laying eggs:
(1,3: San Carlos Beach, Monterey / 2: Monterey State Beach, Monterey)

This species has undergone some revision lately.  Hermissenda crassicornis is a more northern species with a white stripe on its cerata.

Porter's Chromodorid

Mexichromis porterae

(1: Coral Gardens, San Clemente Island / 2-3: Arch Point, Santa Barbara Island / 4-5: Sutil Island, Santa Barbara Island / 6: Nudibranch City, Santa Cruz Island / 7: Golf Ball Drop Off, Santa Cruz Island / 8: Flame Reef, Santa Cruz Island)

Rainbow Dendronotus

Dendronotus iris

(1-3: Monterey State Beach, Monterey / 4-8: San Carlos Beach, Monterey)

These can be up to 8" long.  They are usually red, but occasionally pink.  Just after I took the first picture, this one ate the anemone in front of it:
(1-2: San Carlos Beach, Monterey)

Rainbow dendronotus eat tube-dwelling anemones.  The six shots below cover the process, which took less than 30 seconds:
(1: Monterey State Beach, Monterey)

Rainbow dendronotus lay their eggs on tube-dwelling anemones, ensuring their offspring an easy source of food:
(1: Monterey State Beach, Monterey / 2: San Carlos Beach, Monterey)

This one seems to have had its cerata chewed off by something (probably another nudibranch) and is regrowing them:

Red Aldisa

Aldisa sanguinea

(1: Coral Street, Monterey / 2: Whaler's Cove, Point Lobos)

Red Dorid

Rostanga pulchra

(1-2: Whaler's Cove, Point Lobos / 3: San Carlos Beach, Monterey)

These eat red sponge.  There's a red dorid hiding just right of center:
(1: Whaler's Cove, Point Lobos)

Red Horned Nudibranch

Acanthodoris rhodoceras

(1: Monterey State Beach, Monterey)

Red Sponge Dorid

Rostanga pulchra

(1: San Carlos Beach, Monterey)