It is recorded sometimes in Classical Chinese as wěi-fish (鮪). More poetically, it is sometimes referred to as the "Giant Panda of the Rivers", not because of any physical resemblance to a giant panda, but because of its rarity and protected status. The origin of its binomial name comes from the Greek words pseph (pebble) and phoreus (bearer of), which when combined, also shares the meaning of the Greek word psepharos (gloomy/cloudy one).[citation needed]