river dolphin
Refers to freshwater dolphins found in rivers, such as the Amazon river dolphin or the Ganges river dolphin.
River dolphins inhabit the Amazon River.
イルカ is the general term for dolphin, while カワイルカ specifically refers to freshwater river dolphins.
baiji; Chinese river dolphin; Yangtze dolphin
Katakana spelling is common for this animal name; usually written in kana.
Kanji spelling using 河 (river) and 海豚 (dolphin); rarely used.
Kanji spelling using 川 (river) and 海豚 (dolphin); rarely used.
Compound of 川 (kawa, 'river') and 海豚 (iruka, 'dolphin'). The kanji spellings are straightforward combinations of the characters for 'river' and 'dolphin'.