Rahul Sharma (Editor)

Bobtail squid

Updated on
Share on FacebookTweet on TwitterShare on LinkedInShare on Reddit
Kingdom  Animalia
Superorder  Decapodiformes
Rank  Order
Phylum  Mollusca
Scientific name  Sepiolida
Higher classification  Decapodiformes
Bobtail squid The Light Organ of the Hawaiian Bobtail Squid Was It Designed

Lower classifications  Sepiolidae, Sepiola, Rossia, Sepietta

Bobtail squid aka dumpling squid vs ghost shrimp

Bobtail squid (order Sepiolida) are a group of cephalopods closely related to cuttlefish. Bobtail squid tend to have a rounder mantle than cuttlefish and have no cuttlebone. Despite their name, they are not true squid. They have eight suckered arms and two tentacles and are generally quite small (typical male mantle length being between 1 and 8 cm). Sepiolids live in shallow coastal waters of the Pacific Ocean and some parts of the Indian Ocean and Atlantic Ocean as well as in shallow waters on the west coast of the Cape Peninsula off South Africa. Like cuttlefish, they can swim by either using the fins on their mantle or by jet propulsion. They are also known as dumpling squid (owing to their rounded mantle) or stubby squid.


Bobtail squid Hawaiian Bobtail Squid quotOCEAN TREASURESquot Memorial Library

Cute bobtail squid nautilus live

Light organ

Bobtail squid The Hawaiian Bobtail Squid and its Crazy Tricks Featured Creature

Bobtail squid have a symbiotic relationship with bioluminescent bacteria (Aliivibrio fischeri), which inhabit a special light organ in the squid's mantle. The bacteria are fed a sugar and amino acid solution by the squid and in return hide the squid's silhouette when viewed from below by matching the amount of light hitting the top of the mantle. The organ contains filters which may alter the wavelength of luminescence closer to that of downwelling moonlight and starlight; a lens with biochemical similarities to the squid's eye to diffuse the bacterial luminescence; and a reflector which directs the light ventrally.


Bobtail squid httpsuploadwikimediaorgwikipediacommonsthu

Sepiolida are iteroparous and a female might lay several clutches, each of 1-400 eggs (dependent on species), over her estimated one-year-long lifetime. The eggs are covered with sand and left without parental care. Symbiosis with A. fischeri from the surrounding seawater is initiated immediately upon hatching, and the bacteria's colonisation of the juvenile light-organ induces morphological changes in the squid that lead to maturity.


Bobtail squid Bobtail squid Wikipedia

About 70 species are known. Sepiolid taxonomy within the coleoid cephalopods is currently controversial, thus their position is subject to future change.

  • Subclass Nautiloidea: nautilus
  • Subclass Coleoidea: squid, octopus, cuttlefish
  • Superorder Decapodiformes
  • ?Order †Boletzkyida
  • Order Spirulida: ram's horn squid
  • Order Sepiida: cuttlefish
  • Order Sepiolida: bobtail squid
  • Family Idiosepiidae
  • Family Sepiolidae
  • Order Teuthida: squid
  • Superorder Octopodiformes
  • References

    Bobtail squid Wikipedia

    Similar TopicsRossia