Visualization of Microplastic Uptake in Fish Using Transparent Goldfish
Shizuoka University uses transparent goldfish to visualize the toxicity of microplastics in fish.
📋 Article Processing Timeline
- 📰 Published: March 29, 2026 at 19:47
- 🤖 AI Analyzed: May 26, 2026 at 21:27 (1393h 39m after Published)
A research group led by Professor Toshinobu Tokumoto of the Graduate School of Science and Technology, Shizuoka University, has used transparent goldfish (Note 1) to observe the uptake of microplastics (MP) (Note 2) into the fish body over time, revealing that microplastics primarily accumulate in the gills and exhibit toxicity.
【Research Highlights】
■ Used transparent goldfish that allow internal observation without dissection
■ Used fluorescent microplastics
■ Real-time monitoring of microplastic uptake into the body
In this study, by using approximately one-month-old transparent goldfish fry with nearly transparent bodies and fluorescently labeled 2-micrometer diameter microplastics, the researchers succeeded in observing the uptake of microplastics into the body in real-time.
The results revealed that when fish are exposed to microplastics present in water, accumulation in the gills occurs first. Long-term accumulation in the gills led to necrosis of gill tissue, eventually resulting in death, thereby demonstrating the toxicity of microplastics.
These research results were published online on March 23, 2026, in the international journal "Toxicology Mechanisms and Methods," published by the Taylor & Francis Group.
【Researcher Comment】
Toshinobu Tokumoto, Graduate School of Science and Technology, Shizuoka University
We investigated the impact of microplastics, an environmental issue, using the transparent goldfish we previously established. We are pleased to finally publish research utilizing these transparent goldfish, which took many years to develop. We hope that transparent goldfish will continue to be useful for various types of research.
【Research Overview】
To investigate the effects of microplastics (MP), an exposure experiment was conducted using transparent goldfish (Carassius auratus). Transparent one-month-old fry (Figure 1) were exposed to 2-micrometer diameter fluorescently labeled microplastic beads (FMP), and their uptake into the body was tracked for 4 weeks (28 days). During the administration period, to track the localization of FMP, photographs of the head, abdomen, and tail were taken weekly, and the dates of death were recorded for those that died during the study.
FAQ
What innovative method was used to visualize microplastic uptake in fish?
Researchers utilized transparent goldfish, allowing for internal observation without dissection, and employed fluorescently labeled microplastics.
Where do microplastics primarily accumulate in the fish according to the study?
The study revealed that microplastics primarily accumulate in the gills of the transparent goldfish.
What are the observed toxic effects of microplastic accumulation in fish?
Long-term accumulation of microplastics in the gills led to necrosis of gill tissue, ultimately resulting in the death of the fish, demonstrating toxicity.
What type and size of microplastics were used in the experiment?
The experiment used fluorescently labeled microplastics with a diameter of 2 micrometers.
When and where were the research findings published?
The research results were published online on March 23, 2026, in the international journal "Toxicology Mechanisms and Methods."