Farmed fish (e.g. tilapia, mullet) are forbidden because their food is not clean: they are fed poultry manure and poultry offal, and the waste of fish farms is in turn fed to cattle.

Original statement

انا ما منعتش السمك غير سمك المزارع لان بتاكل سبله بتاكل سبله وبتاكل سقط فراخ وبياخدوا بقى سقط السمك ياكلوالي البهايم شفت انت اللفه لفه مش نضيفه

verbatim according to source. Translation by the project; the Arabic wording is authoritative.

Translation

Farmed fish (e.g. tilapia, mullet) are forbidden because their food is not clean: they are fed poultry manure and poultry offal, and the waste of fish farms is in turn fed to cattle.

Origin

Source status

Video transcript (own words)

Attribution

Elawady (machine transcript)

Video

Dr Diaa Al Awady د ضياء العوضي is live! الخلية منظومة عملاقة (Open source)

Published

1 October 2025

Timestamp

1:12:20 (location in the original video’s automatic YouTube caption track; confirms where the words occur, not who speaks)

Attribution uncertainty

Archive transcript (YouTube CC or AI-generated); wording may contain transcription errors; no timestamps; 'published' is the date listed by the archive. Passage read in context.

Claimed mechanism

Fish fed poultry manure and offal ('unclean' food cycle); fish in stagnant ponds are sick.

Claimed health effect

Implied harm to consumers ('not clean'); swelling ('تورم') mentioned in M7g5LQuRDeA.

Population concerned

General population (Egypt)

Geographic restriction by Elawady

He speaks of Egyptian practices (tilapia/بلطي, mullet/بوري); no explicit restriction, the ban applies to all farmed fish.

Diverging source versions

Scientific assessment

Potentially true – Some evidence points in favour of the statement, but it is not sufficient for a clear judgement.

Certainty of evidence: low – Further research is likely to change the assessment considerably.

1. What was claimed?

Farmed fish eat poultry manure and offal, so their food is unclean and they should not be eaten.

2. What is demonstrably correct?

Integrated fish farms that use poultry droppings/litter as direct feed and pond fertiliser exist (Abu-Elala et al., Egyptian authors: 'Many integrated fish farms depend on the application of poultry droppings/litter' - I-FSH-12). In Upper Egypt, tetracycline residues were found in poultry litter and higher levels of tetracyclines in aquaculture tilapia than Nile River tilapia; the authors warn that poultry litter used for aquaculture may spread resistance (I-FSH-11). Egyptian fish farms often depend on agricultural drainage water, which carries metals and antibiotic residues (I-FSH-08, I-FSH-10, I-FSH-13).

3. What is wrong or exaggerated?

The claim is generalised to all farmed fish. Several Egyptian health-risk assessments found contaminant levels in farmed tilapia muscle within FAO/WHO limits and THQ < 1 (I-FSH-08, I-FSH-10; I-FSH-09 with a cadmium warning for children at one location). Wild Nile tilapia caught near drain outlets also carried pesticide and antibiotic residues (I-FSH-07), so contamination is not limited to farmed fish. The argument that 'unclean' feed makes fish harmful is a moral/aesthetic judgement, not a measured health outcome. Wild mullet and tilapia also feed on detritus; the guest's statement 'they eat garbage' applies to wild fish too.

4. What remains unclear?

How common poultry-manure feeding is in Egyptian commercial tilapia farms today; microbial safety of fish from such ponds.

5. Which studies support it?

I-FSH-11, I-FSH-12, I-FSH-13, I-FSH-112 (501 Egyptian tilapia farms: chicken-manure fertilisation is common, brings no yield or profit benefit, and is linked to more tetracycline resistance genes in pond sediment).

6. Which studies contradict it?

I-FSH-08, I-FSH-09, I-FSH-10; I-FSH-07 (wild river tilapia also carry residues); I-FSH-113 (river tilapia more contaminated than farmed, Pakistan); I-FSH-103 (tilapia, catfish and mullet are FDA/EPA low-mercury 'Best Choices').

7. What applies to Germany and Europe?

Not representative of EU aquaculture.

8. What is known about Egypt?

This is the Egypt-relevant core of the rule. Water source (drainage water) and manure inputs are real quality issues; current studies do not show that muscle from Egyptian farmed tilapia is generally unsafe.

9. What practical conclusion is appropriate?

Prefer fish from controlled, certified sources; the issue in Egypt is farm water quality and inputs, not farming as such.

Assessment details

Rationale for certainty of evidence

The practice of fertilising/feeding fish ponds with poultry droppings is documented for integrated farms (including Egyptian authors), but no data on how common it is in Egypt were found. Consumer-health studies of Egyptian farmed tilapia mostly report muscle contaminant levels within limits.

Source quality

Machine transcript of live talk; claim based on anecdote ('قال لي'), not on data.

Regional transferability

Egypt-specific; not transferable to EU, where feeding of animal manure to farmed fish is not an authorised practice (not verified in a legal text in this review).

Individual exceptions

Not applicable.

Regional scope of the claim

refers to Egypt

Last reviewed

26 October 2026 provisional

Scientific evidence in detail

Overinterpreted – A real finding exists, but the claim draws more from it than the data allow (e.g. association taken as cause, animal data applied to humans, small effect presented as large).

Research question: In Egypt, are farmed fish such as tilapia and mullet fed poultry manure and offal, and does this make them unsafe to eat compared with wild fish?

Study results as reported by the authors. Our assessment follows below.

Open questions

Prevalence of offal feeding; pathogen load in market fish from manure ponds.

How deeply was this checked?

10 linked studies: 2 checked in full text (1 of them with a structured risk-of-bias assessment), 8 on the basis of the abstract, 0 bibliographically only. No formal assessment with two independent reviewers and no independent human expert review has taken place yet.

Last scientific review: 26 October 2026

In plain language

Dr Elawady says he forbids farmed fish such as tilapia because they are fed chicken droppings and chicken waste. Some fish farms do use poultry manure, including in Egypt, and studies found antibiotic residues and resistance genes connected to it. Egyptian fish farms often use drainage water from agriculture. However, several Egyptian studies found that pollutant levels in the edible muscle of farmed tilapia stayed within international limits. So there are real quality problems, but the data do not show that all farmed fish are harmful.

Studies on this claim

Regional context

Germany / EU

Not representative of EU aquaculture.

Egypt

This is the Egypt-relevant core of the rule. Water source (drainage water) and manure inputs are real quality issues; current studies do not show that muscle from Egyptian farmed tilapia is generally unsafe.

• Food-safety governance and official controls
• Pesticide residues in fruit and vegetables on the EU/German market (incl. imports from Egypt)
• Pesticide residues in produce sold on the Egyptian domestic market
• Antibiotic (veterinary drug) residues in poultry meat and eggs
• Antimicrobial use in food animals and antibiotic growth promoters
• Hormones in poultry, meat, milk and farmed fish
• Dioxins, PCBs and PFAS in eggs and other animal foods
• Aflatoxin M1 in milk and dairy products
• Aflatoxins in groundnuts (peanuts)
• Heavy metals in fish
• Farmed fish (aquaculture): drugs, water source and controls
• Import controls and the meaning of RASFF notifications for Egyptian products

What applies in my country?

General scientific assessment

Potentially true Partly based on a real Egyptian practice: chicken manure is commonly used in tilapia ponds and spreads antibiotic resistance, but measured contaminants in Egyptian farmed tilapia muscle are mostly within limits, so a ban on all farmed fish is not justified.

The following areas of food safety are relevant to this statement:

• Pesticides and pesticide residues
• Veterinary medicines and antibiotics
• Hormonal growth promoters
• Contaminants (heavy metals, PFAS, PCBs, dioxins, nitrate)
• Pathogens (Salmonella, Campylobacter, etc.)
• Animal husbandry and feed

Eggs · Poultry · Dairy · Fish and seafood · Red meat · Fruit and vegetables

Limits: legal rules describe what is allowed, not what every single food contains. Measurement data come from samples and are meaningful only together with their method details.

Country of residence or purchase Compare with another country

References

1. Hysterical tetracycline in intensive poultry farms accountable for substantial gene resistance, health and ecological risk in Egypt- manure and fish.. Mahmoud MAM & Abdel-Mohsein HS. Environ Pollut 2019 · PMID 31521994 · DOI 10.1016/j.envpol.2019.113039
2. Comparative analysis of virulence genes, antibiotic resistance and gyrB-based phylogeny of motile Aeromonas species isolates from Nile tilapia and domestic fowl.. Abu-Elala N et al.. Lett Appl Microbiol 2015 · PMID 26280543 · DOI 10.1111/lam.12484
3. Systems-thinking approach to identify and assess feasibility of potential interventions to reduce antibiotic use in tilapia farming in Egypt.. Desbois AP et al.. Aquaculture 2021 · PMID 34276104 · DOI 10.1016/j.aquaculture.2021.736735
4. Poultry manure fertilization of Egyptian aquaculture ponds brings more cons than pros. Nyberg O et al.. Aquaculture 2024 · DOI 10.1016/j.aquaculture.2024.741040
5. Potential health risk assessment of some bioaccumulated metals in Nile tilapia (Oreochromis niloticus) cultured in Kafr El-Shaikh farms, Egypt.. Shaaban NA et al.. Environ Res 2021 · PMID 34043970 · DOI 10.1016/j.envres.2021.111358
6. One health risk assessment of heavy-metal contamination in Nile tilapia (Oreochromis niloticus) from contrasting aquaculture systems in Egypt.. Farahat Abdelmawla M et al.. Toxicol Rep 2026 · PMID 42662802 · DOI 10.1016/j.toxrep.2026.102331
7. Occurrence and human health risks of pesticides and antibiotics in Nile tilapia along the Rosetta Nile branch, Egypt.. Eissa F et al.. Toxicol Rep 2020 · PMID 33384941 · DOI 10.1016/j.toxrep.2020.03.004
8. Advice about Eating Fish: For Those Who Might Become or Are Pregnant or Breastfeeding and Children Ages 1-11 Years (FDA/EPA joint advice, revised October 2021; page content current as of 03/05/2024). US FDA and US EPA. FDA website 2021
9. Assessment of heavy metals and microbial loads in Nile tilapia (Oreochromis niloticus) from different farms and rivers.. Suleman R et al.. Sci Rep 2025 · PMID 39934286 · DOI 10.1038/s41598-025-87152-y
10. Heavy Metals Assessment and Health Risk to Consumers of Two Commercial Fish Species from Polyculture Fishponds in El-Sharkia and Kafr El-Sheikh, Egypt: Physiological and Biochemical Study.. Abbas MMM et al.. Biol Trace Elem Res 2024 · PMID 38129339 · DOI 10.1007/s12011-023-04007-1