

Над водой вдруг мелькнул плавник акулы.
A shark's fin suddenly flashed above the water.
Повар отрезал у рыбы голову и плавники.
The cook cut off the fish's head and fins.
Без хвостового плавника рыба не может нормально плавать.
Without its tail fin, a fish can't swim properly.
"плавник" is in the lesson "Fishes" (Level 14), along with 10 other useful words. LinDuo has 180 topic lessons like this one, 2,380 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.