Question

Most venomous fish is
(a)Stonefish
(b)Catfish
(c)Electric ray
(d)Sawfish

Answer 1

Hint: These are the species of fishes which produce strong mixtures of toxins that are harmful to humans and are delivered using a bite or a sting which results in envenomation. They do not cause poisoning if consumed but can destroy the digestive system.

Complete answer:
Most venomous fish are stonefish which are members of dangerous, venomous species that are fatal to humans and are found in the coastal regions of the Indo-pacific area. They consist of dorsal fin spines that are capable of killing an adult person by injecting venom in less than an hour. They perform camouflage with their surroundings so that their prey and Predator for the scuba divers are unable to see them. This is it on the seafloor and prefers coral and Rocky reefs habitat. It is rarely consumed by people and is not a targeted fishery for this species although some individuals are caught for the private aquarium trade. Human activity does not threaten their habitat as it is important for a scientist to continue research and other species for ensuring that populations are stable.

Additional Information: Catfish: They are a group of ray-finned fish which are the third-largest species and resemble a cat's whiskers. The size can vary from giant catfish that is the Mekong to a small parasitic fish which is candiru. They do not have scales and are defined by Bhai and features of the skull and swim bladder. They are of many importance commercially as they are farmed or fished for food.
Electric ray: It is a group of flattened cartilaginous fishes which are a group of rays and consist of enlarged pectoral fins. They are capable of producing electric discharge which ranges from 8 to 220 volts which are used to stun prey and for defense. They consist of the dorsal fin without a muscular tail and a well developed caudal fin. They consist of thorns with a thick and flabby body and a pair of kidney-shaped electric organs that are present at the base of pectoral fins.
Sawfish: Sawfish has long, narrow, flattened and sharp transversed teeth arranged in a way that resembles a saw. They are slow breeders and the females give birth to the young ones which feed on fish and invertebrates detected and captured with the use of a saw.
So, the correct answer is 'Stonefish'.

Note: Stonefish is the most venomous fish in the world which develops rapid paralysis, tissue necrosis, and heart failure. Due to their camouflage skills, they are often mistaken for a stone or a part of a coral reef. They can survive out of water for up to 24 hours by absorbing oxygen from their skin during the retreating tides.