Daily Reading: Caitanya Caritamrita page-80

CC Ādi 2.97

kṛṣṇera svarūpera haya ṣaḍ-vidha vilāsa
prābhava-vaibhava-rūpe dvi-vidha prakāśa

Translation: 

“The Personality of Godhead Śrī Kṛṣṇa enjoys Himself in six primary expansions. His two manifestations are prābhava and vaibhava.

Purport: 

Now the author of Śrī Caitanya-caritāmṛta turns to a description of the Personality of Godhead Kṛṣṇa in His innumerable expansions. The Lord primarily expands Himself in two categories, namely prābhava and vaibhava.The prābhava forms are fully potent like Śrī Kṛṣṇa, and the vaibhava forms are partially potent. The prābhavaforms are manifested in relation with potencies, but the vaibhava forms are manifested in relation with excellences. The potent prābhava manifestations are also of two varieties: temporary and eternal. The Mohinī, Haṁsa and Śukla forms are manifested only temporarily, in terms of a particular age. Among the other prābhavas, who are not very famous according to the material estimation, are Dhanvantari, Ṛṣabha, Vyāsa, Dattātreya and Kapila. Among the vaibhava-prakāśa forms are Kūrma, Matsya, Nara-Nārāyaṇa, Varāha, Hayagrīva, Pṛśnigarbha, Baladeva, Yajña, Vibhu, Satyasena, Hari, Vaikuṇṭha, Ajita, Vāmana, Sārvabhauma, Ṛṣabha, Viṣvaksena, Dharmasetu, Sudhāmā, Yogeśvara and Bṛhadbhānu.