Age of fishes is

Which period was called ''Age of fishes'' ?

Which periods of paleozoic era are referred as (a) Age of fishes (b) Invertebrates

Extensive fish culture and Intensive fish culture. {: ( "Extensive fish culture", "Intensive fish culture"),( " Culture of fishes in large areas with low stocking density and natural feeding.", "Culture of fishes in small areas with high stocking density and providing artificial feed to increase production."):}

Which period is called age of fishes ?

What are not true? a. Dermal scales of fishes form the exoskeleton b. cycloid and ctenoid scales have distinct lines of growth which aid in determining the age of the fish. c. Fish scales are never shed. d. The skin in elasmobranchs is covered with placoid scales. e. The development of a placoid sale is not like the development of a tooth

What are not true? a. Dermal scales of fishes form the exoskeleton b. cycloid and ctenoid scales have distinct lines of growth which aid in determining the age of the fish. c. Fish scales are never shed. d. The skin in elasmobranchs is covered with placoid scales. e. The development of a placoid sale is not like the development of a tooth

Salmon fishes are group of fishes that belong to :