The mercury that accumulates in the bodies of fish is methylmercury, which is generally considered more toxic.    From Wordnik.com.  [ABC News: Top Stories] Reference

The researchers found that a form of the toxic element, called methylmercury, breaks down more slowly in seawater than in fresh water.    From Wordnik.com.  [Livescience.com] Reference

Plants contain very little methylmercury or other forms of mercury.    From Wordnik.com.  [Public Health Statement for Mercury] Reference

The form of mercury that accumulates in the food chain is methylmercury.    From Wordnik.com.  [Mercury] Reference

When small fish eat the methylmercury in food, it goes into their tissues.    From Wordnik.com.  [Mercury] Reference

When pure, most forms of methylmercury and phenylmercury are white crystalline solids.    From Wordnik.com.  [Mercury] Reference

Like metallic mercury, methylmercury can be changed by your body to inorganic mercury.    From Wordnik.com.  [Public Health Statement for Mercury] Reference

Only fish or wildlife containing relatively high levels of methylmercury are of concern.    From Wordnik.com.  [Public Health Statement for Mercury] Reference

Total mercury and methylmercury levels in fish from hydroelectric reservoirs in Tanzania.    From Wordnik.com.  [Modern environmental health hazards] Reference

This advice is given because methylmercury levels are relatively high in these fish species.    From Wordnik.com.  [Public Health Statement for Mercury] Reference

Measurement of mercury in whole blood or scalp hair is used to monitor exposure to methylmercury.    From Wordnik.com.  [Public Health Statement for Mercury] Reference

This study documents for the first time the formation of methylmercury in the North Pacific Ocean.    From Wordnik.com.  [How Mercury Emissions Reach Tuna And It’s Future Impact On Seafood | Impact Lab] Reference

Many steps up the food chain later, predators like tuna receive methylmercury from the fish they consume.    From Wordnik.com.  [How Mercury Emissions Reach Tuna And It’s Future Impact On Seafood | Impact Lab] Reference

When it reaches the water, microorganisms consume it and convert it into a substance called methylmercury.    From Wordnik.com.  [Field and Stream Report: The Truth about Mercury and the Fish You Eat] Reference

Microorganisms (bacteria, phytoplankton in the ocean, and fungi) convert inorganic mercury to methylmercury.    From Wordnik.com.  [Mercury] Reference

Trading off fish health and safety: female decision-making processes toward the risk of methylmercury in fish.    From Wordnik.com.  [OpEdNews - Quicklink: U.S. may withhold names of retailers in certain meat recalls] Reference

It shows that methylmercury is produced in mid-depth ocean waters by processes linked to the “ocean rain.”.    From Wordnik.com.  [How Mercury Emissions Reach Tuna And It’s Future Impact On Seafood | Impact Lab] Reference

What does chronic exposure to methylmercury, vaporized silver and any number of chemicals affect us as we age.    From Wordnik.com.  [Weekend SkyWatcher's Forecast: March 5-7, 2010 | Universe Today] Reference

As with inorganic mercury, some of the methylmercury in a nursing woman's body will pass into her breast milk.    From Wordnik.com.  [Public Health Statement for Mercury] Reference

Mothers who are exposed to methylmercury and breast-feed their infant may also expose the child through the milk.    From Wordnik.com.  [Public Health Statement for Mercury] Reference

Until the 1970s, methylmercury and ethylmercury compounds were used to protect seed grains from fungal infections.    From Wordnik.com.  [Mercury] Reference

Inorganic mercury and methylmercury can also pass from a mother's body into breast milk and into a nursing infant.    From Wordnik.com.  [Public Health Statement for Mercury] Reference

Under anaerobic (oxygen-deficient) conditions, deposited mercury undergoes biochemical change to become methylmercury.    From Wordnik.com.  [Materials flow of mercury in the economies of the United States and the world] Reference

The Environmental Protection Agency has determined that mercury chloride and methylmercury are possible human carcinogens.    From Wordnik.com.  [Public Health Statement for Mercury] Reference

For fish species with methylmercury levels averaging 0.5 ppm, regular consumption should be limited to 14 ounces per week.    From Wordnik.com.  [Public Health Statement for Mercury] Reference

Abnormal heart rhythms were also seen in children who had eaten grains contaminated with very high levels of methylmercury.    From Wordnik.com.  [Public Health Statement for Mercury] Reference

Territories have issued fish and/or wildlife advisories to warn people about methylmercury contaminated fish and/or wildlife.    From Wordnik.com.  [Public Health Statement for Mercury] Reference

The most common organic mercury compound that microorganisms and natural processes generate from other forms is methylmercury.    From Wordnik.com.  [Mercury] Reference

Metallic mercury or methylmercury that enters the body can also be converted to inorganic mercury and result in kidney damage.    From Wordnik.com.  [Public Health Statement for Mercury] Reference

Once the adverse health effects of methylmercury were known, the use of methymercury and ethylmercury as fungicides was banned.    From Wordnik.com.  [Mercury] Reference

This difference indicates that the nervous system is more sensitive to methylmercury toxicity than are other organs in the body.    From Wordnik.com.  [Public Health Statement for Mercury] Reference

As a result of this study we now know more about how the process which leads to the transformation of mercury into methylmercury.    From Wordnik.com.  [How Mercury Emissions Reach Tuna And It’s Future Impact On Seafood | Impact Lab] Reference

Inorganic mercury salts, such as mercuric chloride, do not enter the brain as readily as methylmercury or metallic mercury vapor.    From Wordnik.com.  [Public Health Statement for Mercury] Reference

Most of the methylmercury advisories relate to specific types of freshwater or saltwater fish or shellfish, or freshwater turtles.    From Wordnik.com.  [Public Health Statement for Mercury] Reference

As a result, the larger and older fish living in contaminated waters build up the highest amounts of methylmercury in their bodies.    From Wordnik.com.  [Mercury] Reference

A study at the University of Tennessee recently rated methylmercury among the most dangerous poisons on Earth (just behind plutonium).    From Wordnik.com.  [Field and Stream Report: The Truth about Mercury and the Fish You Eat] Reference

To reduce your children's exposure to methylmercury, you should follow the instructions recommended in the fish or wildlife advisories.    From Wordnik.com.  [Public Health Statement for Mercury] Reference