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.
Creative Commons Attribution 3.0 (CC BY 3.0)

© Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology

Source: National Museum of Natural History Collections

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Ecology

Habitat

coastal
translation missing: en.license_cc_by_4_0

© WoRMS for SMEBD

Source: World Register of Marine Species

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

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.

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Shelter

Octopus bimaculatus can be found in subtidal and intertidal communities in holes, under rocks, and in crevices. They have been observed to change shelters semi frequently anywhere from daily to after 5 months, but generally stay in the same area. They will leave and return to the same shelter. This could possibly mean that the gastropod and bivalve populations are more severely impacted near octopus shelters from continuously being preyed upon. Abundance of shelters has not shown to limit the population size of the two spotted octopus.

Creative Commons Attribution 3.0 (CC BY 3.0)

© Megan Hayes

Supplier: Megan Hayes

Unreviewed

Article rating from 0 people

Default rating: 2.5 of 5

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.
Creative Commons Attribution 3.0 (CC BY 3.0)

© SPIRE project

Source: SPIRE

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

effect on snails

It can severely diminish the local snail population through predation.

Creative Commons Attribution 3.0 (CC BY 3.0)

© Megan Hayes

Supplier: Megan Hayes

Unreviewed

Article rating from 0 people

Default rating: 2.5 of 5

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]

Octopus bimaculatus model

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. 


Creative Commons Attribution Share Alike 3.0 (CC BY-SA 3.0)

Source: Wikipedia

Unreviewed

Article rating from 0 people

Default rating: 2.5 of 5

Disclaimer

EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

To request an improvement, please leave a comment on the page. Thank you!