The teenager, who was 19 years old, was discovered with a head injury and was bleeding in a restricted section of the La Bajadilla port which is off-limits to the public.
The driver of a BMW was observed sliding around roundabouts at high speeds, and was found to be driving without a license and under the influence of drugs.
The Guardia Civil is looking into the circumstances surrounding the incident on Saturday evening, which resulted in the death of a man in his twenties.
The helm of the craft was being operated by a German man who, as reported by witnesses, was sailing recklessly. After the tragic incident on Saturday, he tested positive for alcohol and drugs.
The man who was arrested, tested positive for alcohol and drugs after the incident, is currently under investigation by police for possible negligent homicide.
The severity of the fight, which involved approximately 100 people, has prompted police to investigate videos posted on social media. Despite the lack of reports from the injured, authorities are taking the incident seriously.
The individuals believed to be responsible quickly left the scene in a dark-colored vehicle following the theft of the victim's mobile phone, cash, and valuables.
At the peak of the fire, approximately 100 professionals, 14 aircraft, and 4 heavy fire-fighting vehicles were engaged in efforts to contain the blaze until it was brought under control at 9pm. Both the Marbella fire station and Malaga's provincial brigade are