Physical Description

Type Information

Syntype for Octopus bimaculatus Verrill, 1883
Catalog Number: USNM 575560
Collection: Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology
Sex/Stage: male;
Preparation: Isopropyl Alcohol
Collector(s): D. Jordan
Locality: Santa Barbara, California, United States, North Pacific Ocean
  • Syntype: Verrill, A. 1883. Bull. Mus. Comp. Zool. 11(6): 121-123, pls. 5-6.
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© Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology

Source: National Museum of Natural History Collections

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Ecology

Habitat

coastal
  • UNESCO-IOC Register of Marine Organisms
Creative Commons Attribution 3.0 (CC BY 3.0)

© WoRMS for SMEBD

Source: World Register of Marine Species

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Depth range based on 9 specimens in 1 taxon.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 1 - 18
  Temperature range (°C): 15.620 - 15.620
  Nitrate (umol/L): 0.799 - 0.799
  Salinity (PPS): 33.472 - 33.472
  Oxygen (ml/l): 5.724 - 5.724
  Phosphate (umol/l): 0.395 - 0.395
  Silicate (umol/l): 2.474 - 2.474

Graphical representation

Depth range (m): 1 - 18
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Associations

Known prey organisms

Octopus bimaculatus preys on:
Paguristes ulreyi
Kelletia kelletii

Based on studies in:
USA: California, Southern California (Marine)

This list may not be complete but is based on published studies.
  • R. J. Rosenthal, W. D. Clarke, P. K. Dayton, Ecology and natural history of a stand of giant kelp, Macrocystis pyrifera, off Del Mar, California. Fish. Bull. (Dublin) 72(3):670-684, from p. 683 (1974).
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© SPIRE project

Source: SPIRE

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Wikipedia

Octopus bimaculatus

Octopus bimaculatus, the California two-spot octopus or Verrill's two-spot octopus, is an octopus common in the subtidal and intertidal zone of Southern California. It is often confused with the related species Octopus bimaculoides, and the common name "California two-spot octopus" is often applied to both species.

Diet[edit]

O. bimaculatus is known to prey on crustaceans, snails, chitons, limpets, and bivalves.[1]

Lifespan[edit]

O. bimaculatus lives about 12–18 months. Young are planktonic for one to several months before settling on the ground.[2]

Reproduction[edit]

Most matings occur in May and June when water temperatures are rising, but they may mate throughout the year. Most females then lay their eggs between April and August.[3]

References[edit]

  1. ^ Ambrose, R. F. (1984). "Food preferences, prey availability, and diet of Octopus bimaculatus Verrill". Journal of Experimental Marine Biology and Ecology 77 (1–2): 29–44. doi:10.1016/0022-0981(84)90049-2. 
  2. ^ Ambrose, R. F. (1986). "Effects of octopus predation on motile invertebrates in a rocky subtidal community". Marine Ecology Progress Series 30: 261–273. doi:10.3354/meps030261. 
  3. ^ Ambrose, R. F. (1988). "Population dynamics of Octopus bimaculatus: Influence of life history patterns, synchronous reproduction and recruitment". Malacologia 29: 23–39. 


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Source: Wikipedia

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