Nivatakavacha

Demons who lived in the depths of the ocean. Their capital was Hiranyapura.

Indra asked Arjuna to kill them.

For this he received the conch Devadatta, which, when blown, caused fear in the enemy. Matali, Indra’s charioteer, drove Arjuna to the Nivatakavacha. Arjuna stormed Hiranyapura and killed them.