

水族館でカワウソが泳ぐ様子を見ました。
カワウソは川で魚を捕まえて食べるそうです。
日本の川では、もう野生のカワウソを見ることはできないそうです。
"カワウソ" is in the lesson "Wild animals" (Level 11), along with 13 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.