観難いですが底板に蝶番を付け、紐を引くと底板が閉まる仕組み
餌をまき、餌につられ魚が中に入ったら紐を引き下の扉を閉める罠
水槽の中の魚を取り出すための罠なんですが
お目当ての魚は警戒心が強く中々入ってくれません
これで1週間経過、随分慣れて少しは中に入るようになったが
もう少し時間がかかりそう
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