Fish

While many people love the taste of smoked salmon, not everyone is comfortable with wild fish being netted, nor with captive fish being farmed. Such folks may be in luck, as a new smoked salmon substitute is in the works – and it's made of algae.

One of the ironies of salmon farming lies in the fact that although the salmon themselves aren't wild-caught, their feed is made up of fish that are. According to new research, it would be ecologically better if we just ate those feed fish ourselves.

Researchers at Harvard and Emory have created a biohybrid fish out of human heart cells that swims autonomously for months at a time as the cells beat. The project is a sidestep on the way to eventually growing new functional hearts for transplant.

We generally don't think of fish as being a vocal bunch – after all, anglers don't typically use "fish calls" to lure them in. According to a new study, however, approximately two-thirds of all fish species probably use sound to communicate.

German scientists have announced the discovery of what is claimed to be the world's largest fish breeding area known to date. Described as a globally unique ecosystem, it consists of tens of millions of icefish nests on the Antarctic sea floor.

Scientists have managed to watch memories form inside the brains of live fish in real time. And the results were intriguing – synapses formed in one part of the brain while disappearing from another, rather than strengthening as previously thought.

One might think that certain animals are only able to navigate within the environment in which their species evolved. According to a new study, however, goldfish are quite capable of steering a land-based "car" toward a land-based target, in order to get a food pellet.

We've all seen sports spectators performing "the wave," where people stand up then sit back down to simulate a wave moving through the stadium. Well, schools of mollies have been found to perform a similar action, in order to keep from being eaten.

The results have been published from a massive clinical trail spanning five years investigating whether omega-3 fish oil supplements improve mood or prevent depression. No differences in any measure were detected between placebo and omega-3 groups.

The mosquitofish is a harmful invasive species in much of the world, outcompeting and overwhelming native fish and other aquatic life. Scientists are now working on a solution to the problem, in the form of a robotic bass.

Despite being related to the humble freshwater perch, the Atlantic goliath grouper grows to be huge – up to 8 feet long (2.4 m) and 800 lb (363 kg). Scientists have recently learned more about its behavior, using a new multifunctional high-tech tag.

Pineapple skin waste typically ends up being composted or dumped in landfills. According to new research, however, a feed additive made from powdered skins has been shown to help farmed tilapia avoid infections, plus it boosts their growth.