The great white shark is very well known for its size, with the  largest individuals known to have approached or exceeded 6 metres  (20 ft) in length and 2,268 kilograms (5,000 lb) in weight. It  reaches maturity at around 15 years of age and can have a life span  of over 30 years.
Benign fasciculation syndrome is characterized by occasional or nearly continuous twitching of various skeletal (voluntary) muscles in the body. This type of muscle twitching can also be seen in association with serious disorders like spinal injury, multiple sclerosis (MS) or amyotrophic lateral sclerosis (ALS).
MOTOR NEURON DISEASES. Amyotrophic Lateral Sclerosis (ALS) is a fatal degenerative disorder of upper and lower motor neurons. Lower motor neuron loss causes muscle weakness, atrophy, and fasciculations; upper motor neuron involvement causes spasticity, clonus, hyperactive tendon reflexes, and Babinski signs.Dementia appears at the onset or develops later in a significant proportion of ALS patients.ower motor neuron loss causes muscle weakness, atrophy, and fasciculations; upper motor neuron involvement causes spasticity, clonus, hyperactive tendon reflexes, and Babinski signs. Dementia appears at the onset or develops later in a significant proportion of ALS patients.