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Fish
A fish is any aquatic vertebrate animal that is typically cold-blooded, covered with scales, and equipped with two sets of paired fins and several unpaired fins.
9,777 Questions
What does scientists know about barrel eye fish?
Scientists at the Monterey Bay Aquarium Research Institute have solved an over 50-year mystery behind the Barreleye fish, finding that the fish can rotate its eyes, but only after discovering that the front of its head is see through.
The see through Barreleye Fish (Macropinna microstoma)was first discovered in 1939, but the transparent nature of the fish wasn't known. The fish had previously been caught in nets, but the see through part is destroyed when the fish dies. The eyes on the fish are unique, facing upwards, so it was thought that it couldn't see in front of itself. The Monterey Bay team sent remotely operated vehicles to the ocean floor to study the fish, only to make the remarkable discovery.
The team managed to capture a live specimen, and over several hours observed the fish rotating its eyes. The see through portion of the Barreleye allows the fish to literally see through itself when looking for food at different angles above it.
Is steelhead a trout or salmon?
STEELHEAD
DID YOU KNOW? Unlike salmon which die after spawning,steelhead may spawn several times.
SCIENTIFIC NAME: Oncorhynchus mykiss, previously known as Salmo gairdneri.
COMMON NAMES: Kamchatka salmon trout, coastal rainbow trout, silvertrout, salmon trout, steelie, hardhead and ironhead.
DESCRIPTION: In the sea, bluish from above and silvery from below -- tends to be more greenish in freshwater. Small black spots on back and most fins. Up to 45 inches in length and 40 pounds in weight; although usually weighs less than 10 pounds.
LIFE CYCLE: Spawning in streams and rivers, steelhead rear in freshwater for 1 to 4 years before migrating downstream through estuaries to the open ocean. Unlike salmon, steelhead migrate individually rather than in schools. Steelhead spend 1 to 5 years at sea before returning to natal streams or rivers. At least two specific stocks of steelhead have developed; those that enter fresh water during fall, winter and early spring -- the winter run -- and those that enter in spring, summer and early fall -- the summer run. Steelhead do not always die after spawning, but will again migrate through estuaries to the ocean.
HABITAT AND ECOLOGY: Steelhead rely on streams, rivers, estuaries and marine habitat during their lifecycle. In freshwater and estuarine habitats, steelhead feed on small crustaceans, insects and small fishes. Eggs are laid in small and medium gravel and need good water flow (to supply oxygen) to survive. After emerging from the redd (nest) they remain in streams and rivers for 1 to 4 years before migrating through the estuaries to the ocean.
Because young steelhead spend a significant portion of their lives in rivers and streams, they are particularly susceptible to human induced changes to water quality and habitat threats. Poor timber and agricultural management practices can lead to siltation in streams, which may ruin spawning beds or smother the eggs. Additionally, in the Columbia River, migrating steelhead face the physical obstacles and high water temperatures resulting from dams, inadequate water flows in rivers and streams due to water diversions for irrigation, and the impoundment of water for power generation.
RANGE: Steelhead were originally found from northwestern Mexico to the Kuskokwim River in Alaska; however, now it is unusual to find steelhead south of Ventura River, California. Significant steelhead rivers in Oregon include the Rogue, Umpqua and Clackamas Rivers.
ECONOMIC VALUE: Steelhead is one of the top five sport fish in North America, and is caught primarily in streams and rivers. At the present time only Native Americans are allowed to fish for steelhead commercially in Washington or Oregon.
They are a trout that are similar to salmon.
Revised 12/16/96
What does it mean when you're called a fish?
If you actually just looked this up, this is why you are being called a fish.
How long does it take for all newborn fish to swim?
When fish eggs hatch the little fish can swim immediately.
What is the difference between a Stingray and a Manta ray?
The stingray is much smaller, but far more dangerous, because its barb contains a poison. The manta ray can be as large as an automobile but is TOTALLY HARMLESS!
Contrary to what the previous writer said, Steve Irwin was killed by a STING RAY. There is no way, other than a one-in-a-million bodily collision that a manta would or could kill anyone. They live on small sea creatures, just as most whales do.
They are different types of rays.
Prawn is a crustacean. Prawn can also be classified as a shellfish.
They need water
Fish can not process oxygen the same way mammels do. They get their oxygen throu molecules in the water.
Is the puffer fish skin dangerous to humans to touch?
Yes, very poisonous. It is not deadly, but if you get stung by one, you should still go to the hospital.
Well it clearly depends on the type of fish you are talking about here...
whales are incapable of swallowing anything larger than an orange and usually feed on small sea creatures... a shark on the other hand could easily kill a seal or any other animal for food...
Most often than not, the giants are not really the bullies in the aquatic kingdom..
There are certain types of Goldfish that can live in those conditions but they along with the Beta will be suffering and not happy. Changing the water often is not a good thing for fish. They like it best when the water chemistry is stable. If you must keep a fish in a tank less than 20 gallons, I would replace 5-10 percent of the water with distilled water everyday. This will dilute the waste products that are in solution. When you have no filter, the fish are essentially living in a septic tank.
