https://www.insightsonindia.com/world-geography/physical-geography-of-the-world/oceanography/bottom-relief-features/relief-features/continental-shelf/
Continental Shelf - INSIGHTS IAS - Simplifying UPSC IAS Exam Preparation
There is no clear or well-defined line separating oceans from continents. The shallow submerged extension of continent is called the continental shelf.
shelf insightsupsc examcontinentaliassimplifying