Clione or "sea angels" are swimming in a Tokyo aquarium November 29, 2004. The Clione, which lives mostly in temperate waters, can be found in the Okhotsk Sea, off the northeastern part of Hokkaido in Japan. 

Clione or "sea angels" are swimming in a Tokyo aquarium November 29, 2004. The Clione, which lives mostly in temperate waters, can be found in the Okhotsk Sea, off the northeastern part of Hokkaido in Japan. 

Clione or "sea angels" swim in a Tokyo aquarium November 29, 2004. The Clione, which lives mostly in temperate waters, can be found in the Okhotsk Sea, off the northeastern part of Hokkaido in Japan. . REUTERS/Kimimasa Mayama KM/CN 

Clione or "sea angels" swim in a Tokyo aquarium November 29, 2004. The Clione, which lives mostly in temperate waters, can be found in the Okhotsk Sea, off the northeastern part of Hokkaido in Japan. . REUTERS/Kimimasa Mayama KM/CN 

Clione or "sea angels" swim in a Tokyo aquarium November 29, 2004. The Clione, which lives mostly in temperate waters, can be found in the Okhotsk Sea, off the northeastern part of Hokkaido in Japan. REUTERS/Kimimasa Mayama KM/CN 

Clione or "sea angels" swim in a Tokyo aquarium November 29, 2004. The Clione, which lives mostly in temperate waters, can be found in the Okhotsk Sea, off the northeastern part of Hokkaido in Japan. REUTERS/Kimimasa Mayama KM 

Clione or "sea angels" are swimming in a Tokyo aquarium November 29, 2004. The Clione, which lives mostly in temperate waters, can be found in the Okhotsk Sea, off the northeastern part of Hokkaido in Japan. . REUTERS/Kimimasa Mayama KM/CN 

Clione or "sea angels" swim in a Tokyo aquarium November 29, 2004. The Clione, which lives mostly in temperate waters, can be found in the Okhotsk Sea, off the northeastern part of Hokkaido in Japan. . REUTERS/Kimimasa Mayama KM/CN 

Clione or "sea angels" swim in a Tokyo aquarium November 29, 2004. The Clione, which lives mostly in temperate waters, can be found in the Okhotsk Sea, off the northeastern part of Hokkaido in Japan. . REUTERS/Kimimasa Mayama KM/CN 

Clione or "sea angels" swim in a Tokyo aquarium November 29, 2004. The Clione, which lives mostly in temperate waters, can be found in the Okhotsk Sea, off the northeastern part of Hokkaido in Japan. .REUTERS/Kimimasa Mayama KM/CN