Externally.
Adult jellyfish reproduce externally by releasing sperm and eggs into the water. When jellyfish are in the polyp stage, they can reproduce asexually by cloning themselves.
They Have Internal Fertilization
internal fertilization
internal
external fertilization
they use internal fertilization they use internal fertilization they use internal fertilization they use internal fertilization
External. In most cases, adults release sperm and eggs into the surrounding water, where the (unprotected) eggs are fertilized and mature into new organisms.
Internal fertilization is considered more advantageous than external fertilization for various reasons. The unborn baby is protected in the internal fertilization from any external threats.
Salmon use external fertilization
Clams utilize external fertilization.
External Fertilization
internal external not internal external not