Caitanya-caritāmṛta 5.78
yadyapi kahiye tāṅre kṛṣṇera ‘kalā’ kari matsya-kūrmādy-avatārera tiṅho avatārī
[yadyapi kahiye taanre krishnera ‘kalaa’ kari matsya-koormaady-avataarera tinho avataaree]
Blended reading (Sanskrit + English inline)
yadyapi kahiye tāṅre kṛṣṇera ‘kalā’ kari matsya-kūrmādy-avatārera tiṅho avatārī
Although Kāraṇodaśāyī Viṣṇu is called a kalā of Lord Kṛṣṇa, He is the source of Matsya, Kūrma and the other incarnations.
My note
Source: vedabase.io