Page 76 - World of Animals - Issue #28 Magazine

Living light
L i v i n g l i g ht

“Prey species cannot
BARBELED
BARBELED
DRA
DRAGONFISH
GONFISH
omiidae
t
S Stomiidae see the predatory
Clas s A ctinopt ery gii
Class Actinopterygii
dragonfish coming”

Barbeled dragonfi sh
B a r be l ed d r a gon fi h
s
use invisible light Territory Southern Pacific
use invisible light
ory
T T T
ory
errit
errit
errit
ory

acifi
c
c

Southern P
Southern P
acifi
Ocean
i
n t
g
h
e
e l
i
s fi
h
ro

s
h p

s i
e
s o
h
u
d
t t
c
h
T
The light this fish produces is on the Ocean
Diet Fish
Diet Fish
c
e
e
o
p
r
u
m
t
r o
e i
a
r
n
f
r
border of the infrared spectrum. This is Lifespan Unknown
f t
b
h
e
d s
d
i
s
r
h
s i
. T
Lifespan Unknown
outside the visible spectrum of most fish,
o u t s i d e t h e v i s i b l e s p e c t r u m o f m o s t fi s h , Adult weight Unknown
Adult weight Unknown
Conservation status
y
so prey species cannot see the predatory Conservation status
t s
a
t
a
o p
c
n
s
o
n
d
e
p
e
e
e
e p
o
h
y s
r
r
e
s c
r
e t
i
dragonfish coming. Along with hunting
n
i
n
o
m
a
g
g
. A
t
g
fi
h h
g w
i
u
n
n
r

h c
o
l
d
i
o

n
t
s
b y i n v i s i b l e l i g h t , t h e d r a g o n fi s h u s e s i t
by invisible light, the dragonfish uses it
NOT EVALUATED
e
o r
d
g
n
i
g
. T
s
a
s
e
n
e f
o
t to recognise friends. The dangling barbel l NOT EV ALUA TED
e
i
l
c
n
h
i
n
g b
e d
b
r
r
a
r
e p
d
n
e
c
t
fi

a
c

t
o
n
u
i
i
u
t
r
s a ro
a
y
t
e i
l
l
s structure plays a role in identification, ,
n i
e
n d
n
s
a
g
t
r
n
f a s
s o
and members of a shoal can distinguish
e
i
a
b
i
m
d m
o
h
l c
a
h
s
i
u
o n e a n o t h e r s i m p l y b y s e e i n g t h e l i g h t .
one another simply by seeing the light.
0
A
e
,
p
e
t
e
At depths of 2,000 metres (6,500 feet)
5
s o
h
)
,
e
e
s (
t d
t
0
0
t
f 2
6
r
0 m
0 f
a
u
l
e
t there are few other options for visual
s
h
r
r
o
w o
s f
e
n
e
t
p
i
e f
r o
h
t
r v
i
o
e a
c o m m u n i c a t i o n , a n d a s t h e i r l i g h t i s
communication, and as their light is

s
g
li
ht

Flashlight fish borrow
h
a
t
e
r s
h
e
i
n
p
invisible to other species, they F F l l a s h li g ht fi sh bo r r o w
c
, t
e t
h
s
i
v
e
y
b
i
s
l
i
e
o o
can shine to their friends
c a n s h i n e t o t h e i r f r i e n d s
bioluminescent bacteria
b
m
ol
ba
r
u
t
c
e
s
n
e
i
c
e
in
i
t
a
a s b r i g h t a s t h e y l i k e . bioluminescent bacteria
as bright as they like.
a
W
W i i t t h o u t t h e a b i i l l i i t t y t o t a l l k l i i k e h u m a n s s , fl a s s h h l l i i g h t fi s s h
t t
y t
k l
e h
k
a
h
o
o t
g
Without the ability to talk like humans, flashlight fish
n
t fi
h
h
, fl
u
h
a
u
m
b
e a
n
r w
c
e b
zl
e
y d
p
m
e
u
a
e
m
h r
a
o
d
n
communicate by dazzling one another with repeated
h
c c o m m u n i i c a t t e b y d a a z z zl i i n g o n e a n o t t h e r w i i t t h r e e p e a t t e d
e a
g o
n
n
o
c
ro
c
ro
s o
s o
e
. T
. T
f
t
f
t
t
s o
e
s o
a
i
f l
u
g
g
f l
t
t
e
i
e
c
h
a
e
e
s f
h
u
c
s f
i
i
t
i
b b
i
r g
m
bursts of light. Their glow actually comes from a species of
m
w a
e
w a
e
l
l
u
u
o
o
p
r g
p
o
o
l
s
m a s
m a s
h
h
l
s
l
y c
y c
l
r
r
e
h
g
h
h
a
n
s i
t l
t o
g
s l
e fi
a
h
n t
e
a
d b
e
n
e
o
a t
h
, l
bacteria that lives in the fish’s light organ, located beneath
a
b b a c c t t e r r i i a t h a t l i i v v e s i n t h e fi s s h ’ ’ s l i i g h t o r r g a n , l o c c a t t e e d b e n e a a t t h
r
e
h
e
s
e t
y c
a
c
each eye socket. They change the message they are
h
t
h
h e
y a
e
e
. T
n
s
g
e m
o
e t
a
c
y
e
a
e s
k
e
each eye socket. They change the message they are
g
h
conveying by increasing or decreasing the frequency of the
u
i
s
e
g o
n
r d
a
g t
s
conveying by increasing or decreasing the frequency of the
i
y o
n
c
a
e
n
e
o
f t
r
h
e
r
c
h
y
c
g b
e f
e
y i
i
n
n
e
r
c
q
v
n
e
flashes, covering or exposing the light organ by moving an
fl fl ashes, covering or exposing the light organ by moving an ashes, covering or exposing the light organ by moving an
i
y
k
e
e fl
e
eyelid-like fl ap. These headlights can also be used to escape ap. These headlights can also be used to escape
eyelid-like flap. These headlights can also be used to escape
-
i
d
l
l
g
t
’
s i
s
a
r
h
n
e
o
i
t
r
s
ro
c
i
n
g a
r
e
a
t
t o
h
n
y s
; b
k
f a p
i
n
u
attack; by shining at full brightness in front of a predator’s
l
l b
n f
attack; by shining at full brightness in front of a predator’s
t f
a
d
t

eyes, the fi
e y e s , t h e fi sh can then dart away while the hunter is stunned.sh can then dart away while the hunter is stunned.

eyes, the fish can then dart away while the hunter is stunned.
Light of their life
Sperm whales rely on ONE-FIN
ONE-FIN
bioluminescence for FLASHLIGHT FISH
FLA
SHLIGHT FISH
t
Pho
on
oblephar
their survival as this Photoblepharon
palpebratum
is how they locate palpebratum ery gii
s
s
ctinopt
A
Class Actinopterygii
Clas
Clas
their prey in the
ocean.
ory
ory
P
P
errit
errit
ory
ory
acifi
c Oc
c Oc
ean
ean

acifi

Territory Pacific Ocean
T T T T
errit
errit
Diet Z ooplank t on
Diet Zooplankton
Zooplankton
Lifespan Unkno
Lif
Unknown
Lifespan Unknown
espan
wn
Adult weight Unknown
dult w
A
wn
eight
Unkno
Adult weight Unknown
tus
ta
Conservation status
C
onserv
a
tion s
Conservation status
EV

TED
ALUA
NOT EVALUATED
NOT
CIGAR C
CIGAR COMB JELLY
Y
OMB JELL
Comb jellies reflect light like

Ber oe Co m b j e lli e s r e fl e c t li g ht li k e
Beroe
Class Nuda
Clas s Nuda
an underwater rainbow
an underwater rainbow
Also known as sea gooseberries, comb jellies aren’t
A l s o k n o w n a s s e a g o o s e b e r r i e s , c o m b j e l l i e s a r e n ’ t
d t
e
h
o j
t c
l
e
y t
l
t
a
l
e
y b
. T
h
e
n
g
l
o
h
l
l
e
a
y

s
fi

l
u
s
e
y r
c
t
o
l
a actually that closely related to jellyfish. They belong
a
s c
, k
m
p
a
n
e
o
n
y o
n
t
w
o
o a f
n a
h
l
e
i
t
r o
w
i
o
s
e
r
h
f t
errit
Open tr
ory
ory
ory
T T T
Open tr
Territory Open tropical seas to a family of their own, known as ctenophores. .
errit
opical seas
opical seas
errit
Glowing bright neon in the dark depths of the
Diet Other comb jellies G l o w i n g b r i g h t n e o n i n t h e d a r k d e p t h s o f t h e
Diet Other comb jellies
Lifespan 3-4 months ocean, these oval jellies propel themselves
Lifespan 3-4 months
, t
l j
m
ro
h
e
o
e o
h
e
c
a
l
e
e
v
e
s
l
a
v
e
e
l
l t
s
n
s p
p
s
i
e
Adult weight Unknown
Adult weight Unknown
g
ro
t
u
i
a
i
h
r u
h
h
s
t
f e
ro
g a g
t
p o
h t
n
u
g
e w
e
Conservation status through the water using a group of eight
Conservation status
p
e
h
t
combs, or cilia, which they operate like the
e
r
a
i
i
k
e t
l
e l
c
, o
h
h
y o
e
b
i
c
m
h t
a
o
s
r c
i
, w
s o
i
p
r
r i
paddles of an oar. The combs shimmer in all l
e c
m
s s
. T
d
b
m
a
h
e
o
a
e
n a
f a
l
n o
m
l
d
h
s
i
a
b
g
s l
h
f t
i
o
t h
n
i
t
w i
h
s o
k a
r
e r
h
o
e d
n t
l
u
o
r
a
NOT EVALUATED
NOT EV ALUA TED c colours of the rainbow in the dark as light hits
a and refracts from the surface. .
c
r
e
f
a
c
e
t
e s
s f
h
a
d r
u
ro
m t
r
f
n
76