Best Lysine-Rich Foods for Freshwater Fishs

Ranked by lysine content among foods safe for freshwater fishs in the Creature Feast catalog.

Bloodworms per 100g freeze-dried: ~2.8g lysine Bloodworms provide lysine, the essential amino acid that is most commonly limiting in plant-based fish diets. Lysine is critical for growth (particularly muscle development), collagen synthesis for scale and fin formation, and immune protein production. For carnivorous and omnivorous species, bloodworms ensure lysine never becomes a bottleneck.

Brine shrimp per 100g freeze-dried: ~2.5g lysine Brine shrimp deliver generous lysine levels as part of their high-quality crustacean protein. The lysine supports rapid tissue growth in juvenile fish and the fin regeneration process when adult fish repair damage from nipping tankmates or sharp decorations.

Mysis shrimp per 100g frozen: ~2.2g lysine Mysis shrimp provide lysine-rich protein that supports collagen production for scale integrity and the structural proteins in fish fins. The amino acid balance of mysis closely matches what fish tissues require for repair and growth.