Fish brains grow when they have to think harder and shrink when in less challenging environments

Fish brains get bigger when they have to think harder and shrink when they are in less challenging environments, studies find Brains of rainbow trout that escaped a fish farm into the wild were 15% heavier The gray matter of lake trout grows in winter when they approach the shoreline, but shrinks in summer when … Read more

New maps hint at how electric fish got their big brains

Helmet-heads of the freshwater fish world, African mormyrid fishes are known for having a brain-to-body size ratio that is similar to humans. But there’s actually a great deal of variation in the size of mormyrid brains. These differences provide an opportunity to look at what’s behind the bulk. Researchers from Washington University in St. Louis … Read more

File:Fish brain.png

File:Fish brain.png Original file (690 × 1,206 pixels, file size: 98 KB, MIME type: image/png) Captions Captions Summary[edit] DescriptionFish brain.png English: Schematic dorsal view of the brain of a trout (Oncorhynchus mykiss) with key features labelled. Date 29 September 2007 (original upload date) Source Transferred from en.wikipedia Author Original uploader was Neale Monks at en.wikipedia … Read more

Ancient Big-Headed Fish May Be the Key to Evolution, Brain Scans Show They Left Water to Invade Land

New research led by Flinders University paleontologist Dr. Alice Clement showed that the cranium of an Australian fish fossil had given insights on evolution, particularly on how the fish first left the waters and invaded the land. The press release via EurekAlert! reported that this big-headed fish is the Cladarosymblema narrienense, a 330 million-year-old fish … Read more

Scientists breed smarter fish but reveal costs of big brains

Science Not Exactly Rocket Science Scientists breed smarter fish but reveal costs of big brains In a Swedish lab, Alexander Kotrschal has deliberately moulded the intelligence of small fish called guppies. From a starting population, he picked individuals with either unusually large or small brains for their bodies, and bred them together. It’s what farmers … Read more


Oranda Oranda Country of origin China Type Veiltailed Breed standards BAS An oranda is a breed of goldfish characterized by a prominent bubble-like “hood” on the head. The headgrowth or hood (also known as wen or crown) may be a prominent growth on the top of the head (cranial region) or may encase the entire … Read more