The parrot fish covers its body, particularly at night, with a gelatin-like substance. Let's have a look at how this substance is produced and utilized. Parrot fish produce this substance in order to protect themselves at night against outside effects. This substance protects the fish against nocturnal hunters. In addition, it enables the fish to camouflage itself.
First, this gelatinous mucus is secreted in glands that are located at the upper edge of the gill cavity, while the fish breathes. After a while, this gelatin-like covering envelops the fish's whole body. The most essential function of this transparent sleeping bag is to protect the fish against moray eels, which are among the greatest enemies of parrot fish. Moray eels have an extraordinarily sensitive sense of smell, and they find their prey using this skill. However, owing to this protective sheath, morays cannot pick up the scent of this fish, and do not notice it even if they strike it while passing beside it.
Considering this remarkable mechanism, one must wonder, how did the parrot fish ever come by this protective sheath they use at night? How could they discover such an important material which interferes with the morays' sharp sense of smell and enables them to spend the night in protected comfort?
It is inconceivable to expect a fish to think up and plan to produce a substance in its body and then cover its body with this substance. In addition, it is not possible either for such a formation to have come into existence on its own over time. If a parrot fish cannot plan to produce such a substance with its own intelligence and form such a system in its body by means of its own will, a parrot fish that lived 10,000 years ago would not have been able to do these things either.
A fish's body's being covered with gelatin in order to camouflage it from its enemy in an appropriate way is a very skillful thing. It is obvious that such a feature can come into being only as a result of an intelligent design. This intelligence belongs not to a fish or any other creature but to God, Who has created and fashioned all of this.