ELECTRIC FISH

The Electroshock Gun in the Electric Eel

The electric eels, whose lengths sometimes exceed 6.6 feet (2 metres), live in the Amazon. Two-thirds of the bodies of these fish are covered with electrical organs, which have around 5,000 to 6,000 electroplaques. Thus, they can produce charges of 500 volts of electricity at about two amperes. This is roughly equivalent to more power than a conventional TV set utilises.
The faculty of generation of electricity has been given to these creatures for purposes both of defence and offence. The fish uses this electricity to kill its predators by giving them an electric shock. The electric shock generated by this fish is enough to kill cattle from a distance of 6.6 feet (2 metres). The electricity-generating mechanism of this fish is capable of engaging as quickly as in two to three thousandth of a second.
Such an immense power in a creature is a tremendous miracle of creation in itself. The system is quite complex and cannot possibly be explained through "step by step" development. That is because an electrical system without full functionality could not bring the creature any advantage in terms of survival. In other words, all components of the system must have been created perfectly at the same time.

Fish that "See" By Means of an Electrical Field

Apart from fish armoured with potential electric charges, there are other fish that generate low voltage signals of two to three volts. If these fish do not use such weak signals for hunting or defence, for what could they be possibly used?
Fish utilise these weak signals as a sensory organ. Allah created a sensory system in the bodies of fish, which transmits and receives these signals.30
The fish produces emissions of electricity in a specialised organ on its tail. The electricity is emitted from thousands of pores on the creature's back in the form of signals that momentarily create an electrical force field surrounding it. Any object within this field refracts it, by which the fish is informed of the size, conductivity and movement of the object. On the body of fish, there are electrical sensors that continuously detect the field just as do radar.
In short, these fish have a radar that transmits electrical signals and interprets the alterations in the fields caused by objects interrupting these signals around their bodies. When the complexity of radar used by humans is considered, the wonderful creation in the body of fish becomes clear.

Special Purpose Receptors

Gnathonemus Petersi

In the bodies of these fish, there are various types of receptors. Ampullary receptors detect the low frequency electrical signals given off by other swimming fish or insect larvae. These receptors are so sensitive that they can even detect the magnetic field of the earth as well as gather information on prey and predators.
The ampullary receptors cannot perceive the high frequency signals transmitted by the fish. This is accomplished by a tubular receptors. These sensors are sensitive to fish's own discharge and they work to map the surroundings.
By means of this system these fish can communicate and warn one another against any threats. They also exchange information about species, age, size and gender.

Signals Describing Gender Differences

Each species of electric fish has a unique signature signal. Furthermore, there can be differences among the individuals of a species. However, the general structure remains unchanged. Some details are particular to the individual. When a female runs across a male fish it immediately senses it and behaves accordingly.

Signals Describing Age

Electrical signals also carry information on the age of these fish. A newly hatched fish bears a different signature from an adult. The signals of the newly hatched fish maintain their characteristic until the fourteenth day after its birth, when they change and become like the normal signals of an adult. This plays a great role in regulating the complex relationships of motherhood and fatherhood. A father can recognise his infant, and bring it home to safety.

Living Activities Communicated Through Signals

Fish can also communicate information other than gender and age. In all the species of electrical fish, frequency hikes transmit alerting messages. For instance, an elephant fish (Mormyridae) normally transmits electrical signals with a frequency of 10 Hz. i.e.10 vibrations per second, which it can easily increase up to 100-120 Hz. A motionless elephant fish warns opponents of an attack. This behaviour resembles the tightening of fists before a fight. Most of the time, this warning is powerful enough to discourage the opponent. After a fight, the wounded party, in an electrical silence, stops sending signals for about 30 minutes. The fish that calms down or leaves the fight usually remains motionless. The purpose behind this is to make it harder for the others to find them. Another purpose is to avoid hitting surrounding objects since they become electrically blind due to lack of signals.

An electric fish locates another one by means of signals.

Special System for Non-Confusion of Signals

So then, what happens when an electric fish comes near another producing the same signals? Does this not interfere with both their radars? Interference would be a normal consequence here. However, they have been created with a natural defence mechanism that prevents this confusion.
Experts name this system "Jamming Avoidance Response" or JAR for short. When the fish encounters another at the same frequency, it changes its frequency. This way confusion is avoided early and it, therefore, never reaches any further.
All of this confirms the extremely complex systems in electrical fish. The origin of these systems cannot be fully explained by evolution. Likewise, Darwin in his book, The Origin of Species, admitted the impossibility of explaining these creatures by his theory in a chapter called "Difficulties of the Theory".31 Since Darwin, the electrical fish have been shown to have much more complex systems than he thought.
Just like all other forms of life, electric fish were also created flawlessly by Allah as a demonstration for us of the existence and infinite knowledge of Allah Who created them.

Types of signals emitted by different species of fish
The fish that transmit electrical waves communicate through these waves. Members of the same species use similar signals. Due to their communal life, they change frequencies in order to prevent confusion, which enables similar but distinct signals to be distinguished.	An electric fish can detect the gender of another by means of signals.

SONAR INSIDE A DOLPHIN'S SKULL

A dolphin can distinguish between two different metal coins under water in complete darkness and up to 2 miles (3 kilometres) away. Does it see that far? No, it does this without seeing. It can make such accurate determinations by means of the perfect design of an echolocation system inside its skull. It gathers very detailed information on shape, size, speed and structure of near objects.
It takes some time for a dolphin to master the skills needed to use such a complicated system. While an experienced adult dolphin can detect most objects through a few signals, a juvenile has to experiment for years.

Dolphins do not use their echolocation just to detect their surroundings. Sometimes they group during feeding and emit high-pitched sounds so powerful that they dazzle their prey, which are then ready to be picked up. An adult dolphin produces sounds inaudible to humans (20,000 Hz. and above). The focusing of soundwaves is done in several areas of the dolphin's head. The melon, which is a fatty structure in the dolphin's forehead, serves as an accaustical lens and focuses the clicks of the dolphin into a narrow beam. Therefore, the dolphin can direct the clicks at will by moving its head. It can direct these waves at will by moving its head.
The clicks immediately echo back when they hit any obstacle. The lower jaw acts as a receptor, which transmits the signals back to the ear. On each side of the lower jaw is a thin bony area, which is in contact with a lipid material. Sound is conducted through this lipid material to the auditory bullae, a large vesicle. Then the ear forwards the data to the brain, which analyses and interprets the meanings. A similar lipid material also exists in the sonar of whales. Different lipids (fatty compounds) bend the ultrasonic (sound waves above our range of hearing) sound waves traveling through them in different ways. The different lipids have to be arranged in the right shape and sequence in order to focus the returning sound waves. Each separate lipid is unique and different from normal blubber lipids and is made by a complicated chemical process that requires a number of different enzymes. This sonar system in dolphins could not possibly have developed gradually, as claimed by the theory of evolution. That is because only by the time the lipids would have evolved to their final place and shape, could the creature have made use of this crucial system. In addition, support systems like the lower jaw, the inner ear system and the analysis centre in the brain would all have to be fully developed. Echolocation clearly is an "irreducibly complex" system, which for it to have evolved in phases is simply impossible. Hence, it is obvious that the system is another flawless creation of Allah.

An adult dolphin radiates sounds inaudible to humans (20,000 Hz. and above). These waves are released from the lobe, called "melon", in front of their heads. It can direct these waves at will by moving its head. The sonar waves are immediately reflected when they encounter any obstacle. Lower jaw acts as a receptor, which transmits the signals back to the ear. Ear forwards the data to the brain, which analyzes and interprets the meanings.