| Hb is present in all vertebrates investigated so far, with the exception of some icefish species. |
| Her namesake was a World War Two model which sank 24,404 tonnes of Japanese shipping when it was still under American command as the USS Icefish. |
| Species such as Antarctic icefish actually need the cold temperatures in order to survive. |
| Schools of icefish spend the day at the seafloor and the night higher in the water column eating plankton and smaller fish. |
| I lobbed an unweighted icefish with an awkward flip of the heavy boat rod. |
| Below the ocean surface lies an even greater diversity of life, replete with corals, sponges and barnacles, as well as icefish and toothfish. |
