Scientists at the Institute of Hydrobiology (IHB) of the Chinese Academy of Sciences, have discovered that a traditional medicinal herb may hold the key to healthier, more sustainable fish farming. Their research reveals that Picria fel-terrae (PFL), when added to fish feed in small amounts, provides remarkable health benefits for farmed fish. 

The study found that zebrafish receiving just 0.1% PFL in their diet for six weeks showed significantly improved gut health, better immune responses, and enhanced ability to fight infections. Unlike fish fed standard diets, the PFL-supplemented group maintained healthy intestinal structures while also developing more protective mucus cells. 

"What makes PFL special is its ability to support fish health in multiple ways simultaneously," explains lead researcher Professor XIA Xiao-qin. "It's not just treating symptoms; it's helping maintain the whole gut-liver system that's so crucial for fish wellbeing." 

The research team employed cutting-edge techniques to understand how PFL works. Curcumin F (a natural compound in the herb) was identified as one of the key players behind the benefits on gut-liver axis. They found the herb helps balance gut bacteria, reduces harmful inflammation, and improves how fish process nutrients. When exposed to dangerous bacteria, fish that received PFL showed much higher survival rates than their untreated counterparts.

These findings couldn't come at a better time for the aquaculture industry, which faces growing challenges from antibiotic resistance and the health impacts of plant-based feeds. PFL offers a natural, sustainable alternative that could help farmers raise healthier fish without relying on medications.

Published in the journal Water Biology and Security, this research bridges traditional herbal knowledge with modern aquaculture science. As fish farming continues to expand globally, solutions like PFL may prove vital for ensuring both animal welfare and food security. 

The study not only validates an ancient remedy but also provides fish farmers with a practical, science-backed tool to improve their operations. With further development, this humble herb could become a game-changer for sustainable aquaculture worldwide.

(Editor: MA Yun)