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Cephalopods are often hard to determinate, also because most Cephalopods posses the ability to change color. They do that by their Chromatophores, pigment-containing and light-reflecting cells, also found in amphibians, fish, reptiles, crustaceans. Sometimes the flash of a strobe makes them change color instantly. Next to that, a lot of Cephalopods, especially squid and cuttlefish, also use Bioluminescence produced by bacterial symbionts.

Cephalopods are the highest developed member of the mollusks; related to, for example, shells and nudibranch.

The name Cephalopods comes from the Greek and means head / foot. The main members are octopus, squid en cuttlefish, but also the seldom seen nautilus and argonauts are part of it.  There are over 800 different species, all marine; there are no fresh water species.

 

 
NL: Pijlinktvis, eieren DE: Gemeiner Kalmar, eier FR: Calmar commun / Encornet, des oeufs

Allotheuthis spec

eggs of Common european squid

Oosterschelde, Netherlands 2007

Dive site: Stavenisse

 NL: Pijlinktvis, eieren DE: Gemeiner Kalmar, eier FR: Calmar commun / Encornet, des oeufs

Allotheuthis spec

eggs of Common european squid

Oosterschelde, Netherlands 2008

Dive site: Anna Jacobapolder

  

IL3-096 Two-tone pygmy squid, Idiosepius pygmaeus

Idiosepius pygmaeus

Two-tone pygmy squid

Lembeh, Indonesia 2008

Dive site: Teluk kembahu II (night dive)

 IAM-043 Two-tone pygmy squid, Idiosepius pygmaeus, with shrimp

Idiosepius pygmaeus

Two-tone pygmy squid

Ambon, Indonesia 2010

house reef Maluku divers (night dive)
IL1-23 Bigfin reef squid

Sepioteuthis lessoniana

Bigfin reef squid

Lembeh, Indonesia 2002

Dive site: Batu putih (night dive)

 FCA-08 Bigfin reef squid

Sepioteuthis lessoniana

Bigfin reef squid

Cabilao, Philippines 2005

Dive site: Lighthouse (night dive)

 FMI-079 Bigfin reef squid 1

Sepioteuthis lessoniana

Bigfin reef squid

Cebu, Philippines 2007

Dive site: Pescador south (night dive)

 FMI-078 Bigfin reef squid 2

Sepioteuthis lessoniana

Bigfin reef squid

Cebu, Philippines 2007

Dive site: Pescador south (night dive)

 IL3-156 Bigfin reef squid, Sepioteuthis lessoniana

Sepioteuthis lessoniana

Bigfin reef squid

Lembeh, Indonesia 2008

Dive site: Air prang (night dive)
IL3-157 Bigfin reef squid, Sepioteuthis lessoniana

Sepioteuthis lessoniana

Bigfin reef squid

Lembeh, Indonesia 2008

Dive site: Aw shucks

 IL3-158 Bigfin reef squid, Sepioteuthis lessoniana

Sepioteuthis lessoniana

Bigfin reef squid

Lembeh, Indonesia 2008

Dive site: Air prang (night dive)

 IL3-140 Bigfin reef squid, Sepioteuthis lessoniana

Sepioteuthis lessoniana

Bigfin reef squid

Lembeh, Indonesia 2008

Dive site: Air prang (night dive)

 IAM-047 Bigfin reef squid, Sepioteuthis lessoniana 1

Sepioteuthis lessoniana

Bigfin reef squid

Ambon, Indonesia 2010

house reef Maluku divers (night dive)

IAM-048 Bigfin reef squid, Sepioteuthis lessoniana 2

Sepioteuthis lessoniana

Bigfin reef squid

Ambon, Indonesia 2010

house reef Maluku divers (night dive)
IAM-271 Bigfin reef squid, Sepioteuthis lessoniana 3

Sepioteuthis lessoniana

Bigfin reef squid

Ambon, Indonesia 2010

house reef Maluku divers (night dive)

 IL4-077 Bigfin reef squid, Sepioteuthis lessoniana

Sepiotheutis lessoniana

Bigfin reef squid

Lembeh, Indonesia 2010

Dive site: Jahir (night dive)

 IL4-072 Bigfin reef squid, Sepioteuthis lessoniana

Sepioteuthis lessoniana

Bigfin reef squid

Lembeh, Indonesia 2010

Dive site: Jahir (night dive)

 IB2-008 Bigfin reef squid, Sepioteuthis lessoniana 1

Sepioteuthis lessoniana

Bigfin reef squid

Bali, Indonesia 2011

Dive site: Seraya

 IB2-009 Bigfin reef squid, Sepioteuthis lessoniana 2

Sepiotheutis lessoniana

Bigfin reef squid

Bali, Indonesia 2011

Dive site: Seraya
IB2-014 Bigfin reef squid, Sepioteuthis lessoniana 3

Sepiotheutis lessoniana

Bigfin reef squid

Bali, Indonesia 2011

Dive site: house reef Kubu Indah (night dive)

 IB2-150 Bigfin reef squid, Sepioteuthis lessoniana

Sepioteuthis lessoniana

Bigfin reef squid

Bali, Indonesia 2011

Dive site: house reef Kubu Indah (night dive)

  

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