Page 77 - World of Animals - Issue #28 Magazine

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Living light
v
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Unagi glows blue
The Japanese

eel was the first
vertebrate found
to be fluorescent.

It glows when blue
light is shone on it.
A
OCK
T
COCKATOO SQUID
C
OO SQUID
Cockatoo squids
eachia
eachia
L L Leachia Co c kat o o sq u i d s
Clas
Clas s s C ephalopoda
Class Cephalopoda
cast no shadow
cast no shadow
ephalopoda
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These incredible creatures are almost
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completely transparent, but they have opaque
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w
errit
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orldwide
W
orldwide
Territory Worldwide e eyes that can give away their presence as
ory
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ory
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Diet Fish, plankton
Diet Fish, plankton they swim through the ocean. To prevent any
Lifespan Unknown
Lifespan Unknown shadows revealing them to predators passing
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Adult weight Unknown
Adult weight Unknown
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Conservation status
Conservation status below, the squids cast a bioluminescent blue
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glow from U-shaped cells beneath their eyes. .
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This eliminates the silhouettes created by their
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DA T A DEFICIENT e eyes and makes it much more difficult for a
DATA DEFICIENT
predator to detect their exact position.
p r e d a t o r t o d e t e c t t h e i r e x a c t p o s i t i o n .
“They have opaque eyes
that can give away their
presence as they swim”
BIGFIN REEF SQUID
BIGFIN REEF SQUID
Sepioteuthis lessoniana
Sepio t euthis les soniana
Clas s C ephalopoda
Class Cephalopoda
The bigfin reef squid has special

Th

Th e b i g fi n r e e f s q u i d h a s spe c i al
e
light-bending cells
light-bending cells
The bigfin reef squid is covered in special cells to make them
T T T errit ory Indo-P acifi c r egion T h e b i g fi n r e e f s q u i d i s c o v e r e d i n s p e c i a l c e l l s t o m a k e t h e m
Territory Indo-Pacific region
errit
egion
Indo-P
acifi
c r
ory
errit
ory
.
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Diet Crustaceans, prawns, fi sh s stand out. Their heads and bodies are covered in chromatophores, ,
Diet Crustaceans, prawns, fish

Lifespan Around one year
Lifespan Around one year w h i c h a r e l i g h t - r e fl e c t i n g c e l l s g i v i n g t h e m a m e t a l l i c i r i d e s c e n t
which are light-reflecting cells giving them a metallic iridescent
Adult weight 600g
Adult weight 600g
sheen. They are also one of the only squid species to possess
Conservation status
Conservation status sheen. They are also one of the only squid species to possess © Thinkstock; Getty; FLPA; Ardea; Alamy © Thinkstock; Getty; FLPA; Ardea; Alamy
leucophores, which are the cells responsible for refl ecting the
leucophores, which are the cells responsible for reflecting the
colour of the ambient light surrounding the squid. These two types
colour of the ambient light surrounding the squid. These two types
of cells work in unison meaning the squid is able to produce a
NOT EVALUATED of cells work in unison meaning the squid is able to produce a
variety of vivid colour combinations and visually striking patterns.
variety of vivid colour combinations and visually striking patterns.
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