Current Situation of Fish Discards and Fish By-ProductsAnaïs Penven and Jean Pascal BergéImproved Utilization of Fish Waste, Discards, and By-Products and Low-Value Fish towards Food and Health ProductsCarlos Cardoso and Leonor NunesFunctional Properties of Fish Protein HydrolysatesCarla Pires, and Irineu BaptistaAntioxidant Effect of Peptides from Marine Fish Protein HydrolysatesIsuru Wijesekara, Dai-Hung Ngo, and Se-Kwon KimACE-Inhibitory Peptides from Marine SourcesRaúl Pérez, Pedro J. García, and Francisco J. EspejoAntimicrobial Peptides from FishYannick FleurySecretagogues Effects of Fish and Shellfish By-Products UpgradingBenoit Cudennec, Pascal Dhulster, and Rozenn RavallecLipids from Marine SourcesRocío Morales and M. Mar MuñíoEnergy Valorization (Biodiesel) from Marine OilsMohriam Khanum and Pedro J. García