Which of the following undergoes metamorphosis?

Development in Petromyzon is indirect and includes a larval stage called ammocoete. Petromyzon is marine but migrates for spawning to fresh water. After spawning, within a few days, they die. Their larvae, after metamorphosis, return to the ocean.Pristis (Chondricthyes-Pisces), Pteropus (Mammalia), Psittacula (Aves) do not undergo metamorphosis. They exhibit direct development.