In larger depths, in which there is little if any light in any way, some animals have grown quite particular skills - they don't have eyes and yet they can see.
Possessing the capacity to observe the world around us is an essential quality that helps us endure. The same holds for the animal kingdom. But, there are a number of species which don't have an organ of sight, not at the classical sense, and they can see.
In larger depths, in which there is little if any light in any way, some animals have grown quite special abilities. As a result of recent advances in genome sequencing, scientists have managed to ascertain what cells are in fact helping the critters to observe if they don't have eyes. These are known as cells that are senile. There are a few other exciting options other species have discovered.
The endings of sea urchin's toes are covered in light-reactive proteins, which transform the entire base of the creature in one massive eye. Sea urchins alter their colors if there's any light stimulation nearby.
They've no problem directing the sea depths without any eyes. This is due to their tentacles, which include the light-sensing proteins in their top.
This species is unique only to the Mammoth Cave region situated in Kentucky. These shrimp species have become endangered, as a result of contamination of the oceans around the planet, and also the simple fact they are autochthonic to just 1 ara. They reside in very dark conditions, but they've adapted so that they could see with the assistance of different sensations.
These blind inhabitants of caves in Missouri are enjoying their life from the dark. They never leave the dark places, so they don't have eyes and are very completely translucent.