A new hybrid fish created through surprise fertilization in a fish nursery was bred from two species that are more distant from one another than humans and mice on the evolutionary tree. A recent study, described in the journal Genes, describes how sperm from an American paddlefish was able to fertilize the eggs of a Russian sturgeon, giving rise to an unheard-of hybrid … [Read more...] about Scientists Are Astounded By A Hybrid Fish’s Birth Of Two Species That Last Coexisted As An Ancestor In The Jurassic
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These Eerie Little Creatures Live Within Fish’s Mouths, Replacing Their Tongues
This dreadful parasitic isopod lives in the mouths of fish, eating their blood and replacing their tongues. While we've already featured some really terrifying aquatic species, such as the Atlantic wolffish and the sardonic fringehead, the tongue-eating louse may be the creepiest of them ever. The tongue-eating louse, Cymothoa exigua, is an isopod (a kind of animal that … [Read more...] about These Eerie Little Creatures Live Within Fish’s Mouths, Replacing Their Tongues