zhè / zhǒng / yú / de / fù / qí / hěn / cháng / kě / yǐ / bāng / zhù / tā / bǎo / chí / píng / héng这种鱼的腹鳍很长,可以帮助它保持平衡。This fish has long pelvic fins, which help it keep its balance.