Kagoshima took up the problem of 'Kuetama', an artificially crossed longtooth grouper and giant sea bream, escaping into the sea in Kinko Bay. It summarizes the concerns about ecological pollution.
I felt that this problem is a really important part for the future of the Japanese fisheries industry.
From the perspective of the development of the fisheries industry and the conservation of the ecosystem, I feel that legislation is necessary to prevent such problems from occurring in the future.
It is not intended to criticize the research and production of the artificial breeds discussed here.
Because I think it is a very valuable research and new breed, I hope that it will support the fishery industry in a way that considers the ecosystem. We ask for your understanding on this matter.
If you agree, please give us a high rating, comment, and share the video on SNS.
[1/31 postscript]
An article about the outflow of hybrid fish was published in the Minami-Nippon Shimbun. Main points below
(1) It is necessary to notify the use of triploids (similar to fish castration processing), but it was found that the prefecture did not grasp it, and it turned out that all maturity is possible.
(2) From the comments of those involved in the development of Kuetama, we learned that the hybrid fish matured but were farmed without knowing whether they would reproduce in nature.
In addition, a company that handles Tamaue also posted a comment saying, ``The possibility is low, but it cannot be said that it will not breed.'' (↓ article link)
https://373news.com/_news/storyid/169...

When I myself made an information disclosure request to Kagoshima Prefecture, I received a response regarding the following points.
(1) Triploids (castration treatment of fish) have not been reported. (i.e. all can be matured)
(2) We do not know what species of fish are farmed in the bay, including hybrid fish, unless reported by the fishermen.
(3) Even if aquaculture cages are damaged and fish are washed out, the government will not investigate the situation unless the fisherman reports the damage. is what they said

From the above answers, we can see that the government was not involved in the management system of aquaculture at all, and everything was left to the fishermen. Not only in Kagoshima Prefecture, but probably in various parts of Japan, the situation is the same.
Based on this incident, I feel that urgent reforms are necessary for the development of a safe fisheries industry.
At the very least, it would be necessary to make it obligatory to report the species of fish to be cultivated, and to report to the government if the cage was damaged and the fish were washed away.

[1/24 postscript]
Based on eyewitness reports by anglers, etc., the possibility of natural breeding at this stage is extremely low.
On the other hand, there is also information that it has been caught in Kanagawa Prefecture, etc., and if such individuals are not natural hybrids, it is expected that they may have flowed out from farms in various places.
At the same time, please understand the following items.

[Refrain from fishing and harpooning aimed at Kuetama]
Fishing, kayaking, and SUP are currently prohibited by ordinances at all evacuation ports in Sakurajima due to the worsening manners of fishing and harpooning in recent years.
Neighboring residents are also becoming very strict, and there is a high possibility that this will be exacerbated, and there is a risk that future investigations will be hindered.
As far as I can see from the information provided, the possibility of breeding is extremely low.
The leaked Kuetama is not at all as many anglers imagine.
In addition, it is necessary for the government and experts to take future measures in order to connect to countermeasures and prevention.
We ask for your understanding and self-restraint in order to avoid further deterioration of marine leisure regulations.

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