In our fish tanks, we love to see the inhabitants. We often structure the rock work in such a way to give the fish the most swimming space in an attempt to lure them out into the open where we can fully enjoy them. But forcing fish out into the water column or in other portions of the viewing space isn’t exactly the healthiest approach. Several species of fish popular to our aquariums are cryptic in nature, meaning they hide in the rocks during the day and frighten easily for the most part. And when we try to get them into the open, they stress out and never do well. They refuse to eat despite our best efforts, and often starve because they are just too stressed to eat. So, this is why it is very important to have plenty of hiding places for fish of all sizes.