In the case of deep-sea predators, there appears to be less bigger consumptive biomass than consumable biomass at present.
Currently, it is probably more advantageous for some luminous predators there than the risk of being eaten.
The optical perception organs are probably reaching an evolutionary dead end down there.
Better eyesight isn't an option.
But everything is in flux, it just depends on the time frame.
Magnetic field perception might be an option.
Are there deep-sea predators that hunt by magnetic sense?
But it's still cheaper to attract the food than to track it in the dark.
How about auditive perception?
Is 'pinging' the prey an option?
Well, one would need some organ that could be converted to ping, which fishes don't have.
Currently, it is probably more advantageous for some luminous predators there than the risk of being eaten. The optical perception organs are probably reaching an evolutionary dead end down there. Better eyesight isn't an option.
But everything is in flux, it just depends on the time frame. Magnetic field perception might be an option. Are there deep-sea predators that hunt by magnetic sense?
But it's still cheaper to attract the food than to track it in the dark.
How about auditive perception?
Is 'pinging' the prey an option?
Well, one would need some organ that could be converted to ping, which fishes don't have.