Oldest Living Fish
Imagine discovering a fish thought to be extinct for 66 million years! This is exactly what happened when a fish was discovered off the South African east coast in 1938. This fish is known as a “living fossil” because it evolved in its present form about 400 million years ago.
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This fish grow to be just over 6 feet long.
Which fish is known as a living fossil?
Goldfish
Goldfish are most often the fish that novice fishkeepers start with, but this little fish has more to it than it is given credit for. Goldfish are fairly intelligent and can recognize the human that regularly feeds them. Happy goldfish are active little fish that gives hours of entertainment.
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The closest relative to this beautiful fish is a nondescript olive/brown fish.
Goldfish belong to which family?
Big Fishes
Fishes vary in length, from the smallest fish (Paedocypris progenetica) at under a third of an inch, to the largest, which can reach lengths of 41.5 feet. This largest fish is actually a filter feeder and eat very small organisms!
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This shark is a gentle creature and harmless to humans.
What is the largest fish living today?
Expensive Fish Products
Beluga caviar is one of the most expensive fish products and a real gourmet dish. This is produced from the roe (eggs) of the female fish. Because this is very high-valued and sought-after, the fishes are seriously over-fished in the wild.
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This fish is native to the Caspian and Black Sea basins.
Which fish produces Beluga caviar?
How Does A Fish Breathe?
Fishes cannot take oxygen out of the air, but rather take dissolved oxygen from the water. A fish has a constant flow of water, passing through its mouth and over the organ that extracts the oxygen.
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These organs are situated just behind the head of the fish.
What organ does a fish use to get oxygen from the water?
Fastest Fish
Fishes are fast swimmers, usually beating a human’s speed in the water of 5 to 6 miles per hour by far! The fastest fishes, at 70 mph even swim faster than a submarine that can only reach about 50 mph.
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This dorsal fin of this fast fish is very big, almost like a sail.
Which is the fastest swimming fish?
Marine Tanks
To keep fish is a very rewarding and interesting hobby. Saltwater tanks were always a bit of a mystery with only the select few that managed it. But not anymore – with all the new equipment available nowadays, it is easy to keep these very beautiful and interesting fishes.
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This green fish is a popular marine fish for beginners.
Which popular saltwater tank fish is shown in the photo?
Sportfishing
Recreational fishing is a rich tradition in the USA, with super fishing spots available all around the country. Take for instance the Florida Keys and the Outer Banks in North Carolina. There is also a variety of fish to catch, with some giving the sportsman a real run for his money!
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These blue fish are fast, clever, powerful, and very acrobatic.
What is the most sought-after saltwater gamefish?
Manta Rays
Manta Rays are biologically close to sharks but are not true sharks. They are also very intelligent and have the largest brain-to-size ratio of any cold-blooded fish. They are able to recognize themselves in a mirror, which only dolphins, elephants, and primates can do.
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Manta rays feed the same way as the biggest whales.
What does Manta Rays eat?
Predatory Fish
Predatory fish are carnivorous fish that actively prey on fish and other marine creatures. Examples of these are shark, billfish, and barracuda. Most of these predators hunt alone, but some hunt in schools. They can be truly terrifying when working together like this.
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These fish feature in a series of movies, first released in 1978.
Which South American predatory fish feed as a group on a victim?
Fish Breeding
Fish can breed in different ways. The most common is for the female to drop the eggs in the water, where it is fertilized by the male. The eggs can also be fertilized inside the female’s body before she drops them in the water, or she can retain the eggs in her body with the young being born alive.
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These are the slowest swimming fishes in the sea.
The males of which fish carry the eggs until they hatch?
Venomous Fishes
Poisonous fish are poisonous to eat, like the pufferfish that will give serious food poisoning if eaten. Other fishes are venomous and use their poison to actively kill their prey or to defend themselves. They will deliberately deliver the poison by means of a bite, sting, or stab.
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These fish are perfectly camouflaged for their stony habitat.
Which is the most venomous fish?
Fish in Cold Water
Fish living in Antarctica have antifreeze glycoproteins that help them survive the freezing water. This, together with the ability to transport oxygen through the body without the need for hemoglobin, cause these fish to thrive at these extreme temperatures.
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There are less than 250 species of fish living in Antarctica.
How many species of fish live around Antarctica in freezing or near-freezing water?
Overfishing
When fish are removed from the sea at a rate faster than the fish can reproduce and therefore replenish the population, it is called overfishing. This can lead to serious imbalances and even the eradication of sensitive species like sea turtles and coral.
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This sea is famous throughout the world for its clear blue waters.
Which sea or ocean is the most overfished?
Famous Fish
Fish have starred prominently in quite a few very enjoyable movies. Take for instance “A Fish called Wanda” and the ever-popular “Finding Nemo”, where an overprotective father is looking for his son with the help of a few friends.
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With a name like this, this fish can be in a circus!
What species of fish was Nemo in the 2003 animation “Finding Nemo”?
Beautiful Fish
You get some of the most colorful animals living in the sea. These colorful fish are mostly found in tropical waters. They do not all occur in the sea, however, some of the freshwater cichlid species are also very colorful.
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Fish do not like to be caught.
What is not a reason that fish have colorful patterns on their bodies?
Fish That Can Fly
Flying fish should actually be called “gliding fish” as these fish cannot really fly. They propel themselves out of the water at great speeds and then glide through the air. They can glide for amazing distances.
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These fish have lots of predators!
Why do flying fish jump out of the water?
Fish in Symbiotic Relationships
In the ocean, there are quite a few relationships between different animals that can be mutually advantageous. One of these is the relationship between cleaner fishes and bigger fishes.
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Fish needs to be cleaned regularly.
What does a cleaner fish do?
Fish Scales
A fish scale is a small, rigid plate that actually grows out of the skin of the fish. Scales can vary greatly in size, from rigid plates in fishes like boxfishes, to being almost absent in eels and anglerfishes.
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Fish scales have a variety of uses.
Why do fish have scales?
Schooling
A school of fish is a group of the same fish species swimming and turning together. Fish sometimes do this at certain times of the year, or under certain conditions, like the yearly sardine run along the east coast of South Africa.
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