Which of the following is a bacterial infectious disease of fishery Disintegrating fins, blood on edges of fins, in rays become brittle and lead to fin and tail rot?

Correct option is A

Tail and fin rot is a bacterial infectious disease commonly observed in fish, including those in fisheries. Symptoms of tail and fin rot include disintegration of fins, the appearance of blood on the edges of fins, and fin rays becoming brittle. The disease is caused by various bacteria, including Aeromonas and Pseudomonas species.
Infections often start at the edges of the fins and tails, leading to deterioration and rotting.