Jellyfish do not have any sort of skeleton.
No.
External
Externally.
Organisms with soft bodies, like jellyfish and worms, are less likely to be fossilized compared to organisms with hard parts such as shells or skeletons. Microorganisms, like bacteria and fungi, also have low fossilization potential.
By definition, arthropod skeletons are external, a defining characteristic of the phylum; having both an internal and external skeleton would be redundant.
no
Butterflies reproduce by internal fertilization and not by external fertilization. Butterflies, like most insects, will then lay the eggs and wait for them to hatch.
Internal skeletons are structural systems found inside the bodies of animals, providing support and protection for their organs. These skeletons can be made of bone (as in mammals), cartilage (as in sharks), or a combination of both. Internal skeletons allow for greater flexibility and movement compared to external skeletons like shells or exoskeletons.
Jellyfish don't have skeletons.
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.
Arthropods use external skeletons (exoskeletons).
Jellies don't have skeletons.