**M. Azizur Rahman 1,2**


Received: 22 December 2018; Accepted: 5 February 2019; Published: 14 February 2019

**Abstract:** The extraction and purification of collagen are of great interest due to its biological function and medicinal applications. Although marine invertebrates are abundant in the animal kingdom, our knowledge of their extracellular matrix (ECM), which mainly contains collagen, is lacking. The functions of collagen isolated from marine invertebrates remain an untouched source of the proteinaceous component in the development of groundbreaking pharmaceuticals. This review will give an overview of currently used collagens and their future applications, as well as the methodological issues of collagens from marine invertebrates for potential drug discovery.

**Keywords:** collagen; chitin; corals; extracellular matrix; marine invertebrates; marine proteins
