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What

Arboreal salamander Aneides lugubris

Observer

mulan

Date

March 29, 2014 08:39 PM PDT

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Observer

mulan

Date

May 29, 2013 10:05 PM PDT

Description

Looks like a cross between a scorpion and a tick.

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What

Tunicates Class Ascidiacea

Observer

anudibranchmom

Date

August 30, 2014 05:11 PM PDT

Description

Tiny (less than 1/4"), spreading everywhere on old sea lettuce. Each has a tiny reddish orange top.

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What

Great Egret Ardea alba

Observer

anudibranchmom

Date

August 30, 2014 01:57 PM PDT

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Observer

anudibranchmom

Date

August 30, 2014 01:49 PM PDT

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Observer

anudibranchmom

Date

August 30, 2014 01:34 PM PDT

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What

True Limpets Genus Lottia

Observer

anudibranchmom

Date

August 30, 2014 01:49 PM PDT

Description

About 1/2". Was found on sea lettuce, which was pumping out bubbles of oxygen which stuck on the limpet's shell.

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Observer

anudibranchmom

Date

August 30, 2014 01:33 PM PDT

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What

Eastern Oyster Drill Urosalpinx cinerea

Observer

anudibranchmom

Date

August 30, 2014 01:32 PM PDT

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What

Tunicates Class Ascidiacea

Observer

anudibranchmom

Date

August 30, 2014 03:13 PM PDT

Description

About 2" high, brown and white stripes.

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What

Feather Duster Worms Family Sabellidae

Observer

anudibranchmom

Date

August 30, 2014 02:53 PM PDT

Description

Maybe "Parasol Feather Duster" (old names: Demonax medius or Sabella media).

Photos / Sounds

What

Bay Pipefish Syngnathus leptorhynchus

Observer

anudibranchmom

Date

August 30, 2014 02:52 PM PDT

Photos / Sounds

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What

Tunicates Class Ascidiacea

Observer

anudibranchmom

Date

August 30, 2014 02:47 PM PDT

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What

Mask Limpet Lottia persona

Observer

anudibranchmom

Date

August 30, 2014 03:15 PM PDT

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Observer

anudibranchmom

Date

August 30, 2014 03:51 PM PDT

Description

Another one, darker (orange on one side, balck or dark brown on the other).

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Observer

anudibranchmom

Date

August 30, 2014 03:18 PM PDT

Description

"Orange Finger Sponge," ID as per Lamb and Hanby p. 68.

Photos / Sounds

What

Algae Class Phaeophyceae

Observer

anudibranchmom

Date

August 30, 2014 03:18 PM PDT

Description

Lacy, fine, nearly translucent light brown algae (or possibly seaweed) growing profusely on dock. Clumps 6-12" but hard to tell where one ends and he next one starts because it was so fragile.

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Observer

anudibranchmom

Date

August 30, 2014 03:18 PM PDT

Description

"Spaghetti Sponge," ID as per Lamb and Hanby, p. 62.

Photos / Sounds

What

Mask Limpet Lottia persona

Observer

anudibranchmom

Date

August 30, 2014 04:07 PM PDT

Photos / Sounds

Observer

anudibranchmom

Date

August 30, 2014 04:07 PM PDT

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Observer

anudibranchmom

Date

August 30, 2014 04:02 PM PDT

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What

Tunicates Subphylum Tunicata

Observer

anudibranchmom

Date

August 30, 2014 03:58 PM PDT

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Observer

anudibranchmom

Date

August 30, 2014 03:52 PM PDT

Description

About 1/2" long, saw several of them in various red/yellow/orange colors speeding along just below the surface of the water.

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What

Amphipods and Isopods Superorder Peracarida

Observer

anudibranchmom

Date

August 30, 2014 03:59 PM PDT

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What

Musculista senhausia Arcuatula senhousia

Observer

anudibranchmom

Date

August 30, 2014 03:57 PM PDT

Description

AKA Japan Mussel.

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Observer

anudibranchmom

Date

August 30, 2014 03:57 PM PDT

Photos / Sounds

What

Sea Lettuce Ulva lactuca

Observer

anudibranchmom

Date

August 30, 2014 02:48 PM PDT

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What

Enteromorpha intestinalis Ulva intestinalis

Observer

anudibranchmom

Date

August 30, 2014 02:51 PM PDT

Photos / Sounds

What

Dead Man's Fingers Codium fragile

Observer

anudibranchmom

Date

August 30, 2014 02:22 PM PDT

Photos / Sounds

Observer

anudibranchmom

Date

August 30, 2014 01:46 PM PDT

Description

I'm no expert, but all of the Lake Merritt C. percas I've seen have 2 unique characteristics --
1) two tiny black 'eyespot' dots behind their rhinophores, and
2) faint white bands near the tips of their cerrata
Neither of these characteristics are mentioned in Beherens 'Eastern Pacific Nudibranchs,' p. 128, although his photo does seem to show the 'eyespots.' Has anyone noticed these markings anywhere else but Lake Merritt?