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cuttle reaction to changes in light.

William Tyson

Vampyroteuthis
Registered
Joined
Aug 15, 2005
Messages
410
#1
i was wondering if cuttles have night vision abilities and/or the ability to dicern amounts of light (shadows).

the main reason i was asking is last night i was walking past my tank when the lights were all off in the tank and only a small lamp on the other side of the room was on. as i walked past the tank my cuttle inked and i guess i must have frightened it. The only thing is that it was very dark if i had not been paying attention to the lil guy as i walked buy i would never had seen it. so do cuttles have night vision or could he just see my shadow as i walked in front of the tank.
 

main_board

Vampyroteuthis
Supporter
Joined
Feb 5, 2003
Messages
373
#3
Also creatures that inhabit water often react to vibration even if they can't see what creates it. Your footsteps combined with low visibility would be enough to make him defensive as he couldn't see whether you were friend or foe. They're a little different, I know fish do this all the time.

Cheers!
 

Jean

Colossal Squid
Supporter
Joined
Nov 19, 2002
Messages
4,218
Location
Dunedin, New Zealand
#5
It may also have vision that is triggered by movement. I believe (although anyone can step in here and correct me!!) that many predators do and that this is quite sensitive even in low light conditions!

some speculation anyway!

j
 

tjohnson

Wonderpus
Registered
Joined
Aug 9, 2004
Messages
195
#6
I beleive that by walking infront of the light, it created a flash effect to him, which just caught the little guy off guard and starteled
 

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