The correct option is
A HippocampusA. Hippocampus, commonly called as a seahorse, is a marine fish.
B. Labeo, known as the carp fish, is found in clear and sluggish streams and rivers.
C. Anabas, known as the climbing perch, is a common freshwater fish.
D. Scoliodon, commonly known as dogfish, is generally found in the bay of Bengal.
Paternal care is the taking care of young ones by males. It is found in the Hippocampus. The eggs are laid in the pouch of males, by females. The males take care of the eggs until they hatch and young ones come out.
So, the correct answer is 'Hippocampus'.