Pehub -- Nereus Pharmaceuticals Inc., a San Diego-based drug developer that uses marine microbial sources, has raised $20 million in new VC funding. HBM BioVentures led the round, and was joined by Alta Partners, Forward Ventures, Gimv, Advent International, Pacific Venture Group, Roche Venture Fund and Astellas Venture Management. The company has raised over $145 million in total VC funding since 1998.