Hey everyone,

I came across a really insightful review by Prof. Ilhan Altinok (Reviews in Aquaculture) that addresses a common frustration in modern aquaculture: getting an accurate PCR test, applying treatment, and watching mortality continue anyway.

The article argues that 19th-century "one pathogen, one disease" models (Koch's postulates) don't fit open-system aquaculture where environmental parameters fluctuate constantly.

Key Takeaways:

• Syndromic Convergence: Outbreaks where mortality is >1.5x the combined impact of individual pathogens due to synergistic interactions.
• Classic Example (WFS): EHP hijacks cellular ATP (reducing levels by 40–60%) and alters gut flora, letting Vibrio colonize. Neither reproduces White Feces Syndrome on its own.
• Thermal Triggers: Temperature spikes activate virulence genes in bacteria at the exact time host immune defenses drop by 25%+.
• Early Warning Index: A practical 0–10 score using water quality, microbiome shifts, behavior, and stress history to catch outbreaks early.

Full article link:https://aquahoy.com/syndromic-convergence-disease-outbreaks-aquaculture/

Curious to hear how operators here are dealing with multi-agent infections or tracking non-lethal stress parameters in their ponds/pens?

The European Market Observatory for Fisheries and Aquaculture Products (EUMOFA) recently published its updated report analyzing EU seafood consumption trends over the past decade.

Here are the key findings from the data:

• Overall drop in wild fisheries: Total consumption dropped from ~13M tonnes in 2014 to ~10M tonnes in 2023. Wild species took a huge hit (cod supply dropped 43% due to quota cuts).
• Aquaculture filling the gap: While overall consumption declined, species with strong aquaculture supply chains (salmon, sea bass, sea bream, trout, shrimp) stabilized or grew.
• Retail & Convenience driving species selection: Supermarkets control ~79% of sales and heavily favor predictable pricing and year-round availability. Younger consumers increasingly avoid buying whole fish, opting for portioned/ready-to-cook fillets instead (studies show consumers pay up to €0.50/kg extra for convenience formats).
• Import reliance: The EU imports about 70% of its seafood. Self-sufficiency for salmon sits at just 1%, whereas trout (84%) and sea bream (74%) demonstrate strong internal production capacity.

It seems the future of retail seafood in Europe is almost entirely centered around predictable, convenience-focused aquaculture supply chains.

What are your thoughts on this shift? Do you see similar retail dynamics happening in other regions outside the EU?

Link to full summary:https://aquahoy.com/euomofa-2026-aquaculture-growth-eu-fish-consumption/

Rabbitfish (Siganus spp.) are frequently recommended as the ultimate biological solution for tank algae, but solid, aggregated information on them is often hard to find.

I’ve put together a comprehensive guide that deep-dives into the actual biology and husbandry of the Siganidae family.

Key areas covered:

• Tank Requirements: Minimum dimensions and volume metrics needed for an open-swimming room.

• The Venom Apparatus: The toxicology of their dorsal/anal spines and a definitive first-aid guide for spine punctures (heat-based treatment).

• Diet & Nutrition: Keeping these heavy herbivores satisfied so they don't nip at your corals.

• The 'Inebriating Fish': The wild phenomenon of ichthyoallyeinotoxism found in certain wild species.

• Aquaculture Potential: How they are being used for polyculture and algae bioremediation.

Whether you are looking to buy your first Foxface or want to understand their complex stress-induced color mimicry, check out the full guide:

https://aquahoy.com/rabbitfish-siganidae-care-aquarium-species-venom-diet/

Let's discuss—what's your take on their 'reef-safe' status? Have you ever noticed them nipping at LPS or soft corals when underfed?

Hey everyone,

I thought this community would find this recent research interesting. A joint study between UTMACH (Ecuador) and the Federal University of Santa Catarina (Brazil) monitored commercial 5-hectare shrimp ponds to map out how shrimp actually distribute themselves.

Key takeaways:

• Clustered behavior: Shrimp are not randomly dispersed. They exhibit highly aggregated schooling behavior throughout the culture cycle.
• Depth is the main predictor: There is an inverse relationship between water depth and shrimp density. The deep perimeter trenches ("borrow pits") had significantly lower densities (~5 shrimp/m² vs ~6.5 shrimp/m² on the flat bottom "mesa").
• Size segregation: The largest shrimp were caught on the "mesa" (flat central area), showing significantly higher average body weights than those in the borrow pits.
• Avoidance of deep zones: The study suggests shrimp actively avoid deep zones due to organic waste buildup, which can cause benthic oxygen depletion and toxic metabolites (ammonia/H2S).

This strongly suggests that traditional sampling routines—such as throwing cast nets repeatedly in the same easily accessible deep spots—lead to massive biases in biomass calculation, which in turn messes up feed rationing and aerator placement.

What are your thoughts on this? How do you randomize or adapt your sampling zones to account for this behavior?

Link to the full article:https://aquahoy.com/shrimp-distribution-pond-sampling-feeding/