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Fieldtrip to Abalone Cove, Palos Verdes, Los Angeles Co., CA, February 8, 2008 (see also February 1)

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A sunny afternoon…
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…at Abalone Cove
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Cyanoplax hartwegii
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C. hartwegii
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C. hartwegii
(Hartweg's chiton)
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C. hartwegii
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Lottia limatula and
Cyanoplax keepiana
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L. limatula
(file limpet)
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L. limatula has dark head, cephalic tentacles, and side of foot
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C. keepiana (underwater) were
out foraging as the tide turned
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A small Pachygrapsus crassipes among barnacles
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P. crassipes
(lined shore crab)
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Anthopleura sola
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A. sola
(sunburst anemone)
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Strongylocentrotus purpuratus
(purple urchin)
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Conus californicus
(Calif. cone snail)
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Stenoplax conspicua
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S. conspicua
(conspicuous chiton)
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S. conspicua
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S. conspicua
(point to line of file=62mm)
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S. conspicua
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S. conspicua
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S. conspicua
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Aplysia californica releasing ink
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A. californica
(Calif. sea hare)
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"Lottia" paleacea
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"L." paleacea (surfgrass limpet)
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"L." paleacea
(note grazed area behind limpet)
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Anthopleura sola, Pisaster ochraceus, and Corallina chilensis (see here)
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Serpulorbis squamigerus
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Small red urchin with purple urchins
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Ophiothrix spiculata
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Ophiothrix spiculata
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small S. conspicua
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Leptochiton rugatus (small white chiton in foreground) with much larger S. conspicua
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Volvarina taeniolata
(banded California marginella)

"Little is known of the biology of this common small snail" (Abbott & Haderlie)
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V. taeniolata with
brittlestars (unidentified)
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V. taeniolata with
brittlestars (unidentified)
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Leptochiton rugatus
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L. rugatus
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Stenoplax conspicua
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Stenoplax conspicua
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hermit in Opalia funiculata shell
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Hermit crab is possibly Pagurus hirsutiusculus (juvenile)
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P. hirsutiusculus (?) in O. funiculata shell
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Eupentacta quinquesemita
(stiff-footed sea cucumber
; see here and compare Cucumaria piperata)
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Sea cucumber eviscerating sticky cuverian tubercles (see here)
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Ceratostoma nuttalli
(Nuttall's hornmouth)
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C. nuttalli
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pycnogonid (possibly Pycnogonum stearnsii) male carrying mass of embryos
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pycnogonid (sea spider)
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Pisaster ochraceus juvenile
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Ophiopterus papillosa
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O. papillosa
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Ophioplocus esmarki (L) and Ophiopterus papillosa (R)
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unidentified hermit crab; possibly Isocheles pilosus
- compare these: 1 - 2 - 3 - 4
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This hermit has an unstudied (?) associated bryozoan on its shell (see Williams & McDermott 2004, JEMBE 305:1-128)
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Megathura crenulata
(Giant keyhole limpet)
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M. crenulata
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Possibly Betaeus longidactylus
(visored shrimp; eyes under carapace, no forward spine between eyes)
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Cyanoplax hartwegii
(Hartweg's chiton)
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C. hartwegii on shell of Venerupis philippinarum or Leukoma staminea
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Lepidozona pectinulata
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L. pectinulata
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Octopus was actively ventilating its gills from under a rock
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Aplysia vaccaria is world's largest gastropod, up to 99 cm length & 14 kg, feeding mainly on Egregia (see here)
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Mopalia muscosa
(mossy chiton)
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M. muscosa
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