Srimad Bhagavatam Canto 08, Chapter 07, Text 18

SB 8.7.18

nirmathyamanad udadher abhud visam
 maholbanam halahalahvam agratah
sambhranta-minonmakarahi-kacchapat
 timi-dvipa-graha-timingilakulat
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
The fish, sharks, tortoises and snakes were most agitated and perturbed. The entire ocean became turbulent, and even the large aquatic animals like whales, water elephants, crocodiles and timingila fish [large whales that can swallow small whales] came to the surface. While the ocean was being churned in this way, it first produced a fiercely dangerous poison called halahala.
Srimad Bhagavatam Canto 08, Chapter 07, Text 17
Srimad Bhagavatam Canto 08, Chapter 07, Text 19