Human....because egg is fertilize inside the female body and came out being a baby

Organism with Internal Fertilization and External Growth of Baby: Seahorses

Seahorses are a fascinating example of an organism that exhibits internal fertilization and external growth of their offspring. They belong to the family Syngnathidae and are found in shallow tropical and temperate waters around the world. Seahorses have unique reproductive strategies that make them stand out among other marine creatures.

Internal Fertilization:
Seahorses have a well-developed reproductive system, and the males are responsible for carrying the eggs until they hatch. During courtship, the male and female seahorses engage in an elaborate dance, which can last for several hours. This dance involves intertwining their tails and swimming together in a coordinated manner.

During mating, the female seahorse deposits her eggs into a special pouch located on the ventral side of the male's tail. The male then fertilizes the eggs internally by releasing sperm into the pouch. The fertilized eggs are then attached to the walls of the pouch, where they receive nourishment and protection during development.

External Growth of Baby:
Once the eggs are fertilized, the male seahorse undergoes a period of gestation, which lasts around 2-4 weeks, depending on the species. During this time, the male provides a safe environment for the developing embryos within his pouch. He also supplies them with oxygen and nutrients through a rich blood supply.

As the embryos grow, they go through several stages of development. After the gestation period, the male seahorse goes through a series of muscular contractions to expel the fully developed offspring from his pouch. This process is similar to giving birth. The tiny seahorse fry, which resemble miniature versions of their parents, are then released into the water.

Conclusion:
Seahorses demonstrate a unique reproductive strategy with internal fertilization and external growth of their offspring. The male's pouch provides a protective environment for the developing embryos, allowing them to receive the necessary nutrients and oxygen for their growth. Once the embryos have fully developed, they are released into the water, where they begin their independent lives. This reproductive strategy of seahorses is truly remarkable and adds to the diversity of reproductive strategies found in the animal kingdom.