In beginning chapters of Mahabharata:Adi Parva it's stated that Kāśyapa (काश्यप) was going to King Parikshit on the day when Taksaka was supposed to kill him. But Taksaka met with him on the way and returned him after giving lot of money (which he wished to get from the king Parikshit after saving his life).
तं ददर्श स नागेन्द्रस्तक्षकः काश्यपं पथि।
गच्छन्तमेकमनसं द्विजो भूत्वा वयोऽतिगः॥ 1-42-37 ~Sanskrit Shlokas source
My question is who was this Kāśyapa (काश्यप)? Was he related to famous sage Kaśyapa (कश्यप)? This link gives some info but not conclusive enough.
Also if he was someone other than Kaśyapa (कश्यप) then, what was the significance of Lord Brahma teaching Vishharini vidya to Kaśyapa when Kadru cursed her children Sarpas/Nagas?
आहूय कश्यपं देव इदं वचनमब्रवीत्।
यदेते दन्दशूकाश्च सर्पा जातास्त्वयानघ॥ 1-20-14 ~Sanskrit Shlokas source