śrī-rājovāca
bhagavañ chrotum icchāmi
harer adbhuta-karmaṇaḥ
avatāra-kathām ādyāṁ
māyā-matsya-viḍambanam
śrī-rājā uvāca - King Parīkṣit said; bhagavan - O most powerful; śrotum - to hear; icchāmi - I desire; hareḥ - of the Supreme Personality of Godhead, Hari; adbhuta-karmaṇaḥ - whose activities are wonderful; avatāra-kathām - pastimes of the incarnation; ādyām - first; māyā-matsya-viḍambanam - which is simply an imitation of a fish.
The Supreme Personality of Godhead is all-powerful, yet He accepted the form of an uncommon fish. This is one of the ten original incarnations of the Lord.