Jalajā nava-lakṣāṇi. In the aquatic, there are 900,000 species of life. Now, if you have got your science, go and see. This is Vedic knowledge—perfect, without any doubt. Sthāvarā lakṣa-viṁśati: and the plants and trees, they are 2,000,000 species of life. So, ei rūpe brahmāṇḍa bhramite (CC Madhya 19.151). We are transmigrating from one species of life, one species of life, another, another, another, another . . .
They cannot explain why there are so many varieties of life. The varieties of life is there because we have desire, kāma. "I want this," "All right, take this." Kṛṣṇa is immediately prepared. Ye yathā māṁ prapadyante (BG 4.11). "If you want, you can take it." But Kṛṣṇa says, ultimately that, "You'll never be happy in this way. Therefore you give up this business. Simply surrender unto Me." Sarva-dharmān parityajya mām ekaṁ śaraṇam (BG 18.66). So that is called akāma.
So here it is said that akāmaḥ yajet puruṣaṁ param. If you want to be akāma, devoid of all material desire, then surrender to Kṛṣṇa. That will save you from this business of rotating from one sort of body to another sort of body. Therefore Caitanya Mahāprabhu said, ei rūpe brahmāṇḍa bhramite kona bhāgyavān jīva (CC Madhya 19.151). To come to Kṛṣṇa consciousness is not very easy thing. It is by the grace of guru, guru-kṛṣṇa, and grace of Kṛṣṇa, combined together.