1. a small fish found in Antarctic waters, notable for having no hemoglobin and transparent blood
Usage: also called toddyfish or white-blooded fish; scientific name: Channichthyidae family
2. any of various other small fish found in cold waters, especially those adapted to icy environments
Usage: general usage

Examples

• The icefish is one of the most unusual creatures in Antarctic waters.
• Scientists study icefish to understand how organisms survive in extreme cold.
• The icefish's lack of hemoglobin makes its blood appear clear or white.
• Icefish have adapted to live beneath the ice shelves of Antarctica.
• The transparent blood of the icefish allows researchers to observe its circulatory system directly.