Most Big Fish
Claribel Szwaja
The largest fish in the world ... is actually a shark. Specifically, the whale shark, which grows to more than 50 feet long and may weigh several tons. The second largest is the basking shark, which can measure 35 to 40 feet long.
The most common fish is any of the species of a deepwater fish sometimes called a "bristle mouth." The fish is about the size of a small minnow. It is caught at 500 meters or deeper all over the world.
Scientists can figure out how old a fish is by counting growth rings on its scales or its ear bones (called "otoliths"). The rings mark seasonal changes in fish growth, like the annual rings in tree trunks.
In scales, a series of fine rings appear as the scale grows. In summer the rings are wider apart. In winter the rings are closer together, because the fish grow more slowly. Each pair of rings indicates one year.
The dictionary defines sleep as a recurrent period of rest in which the nervous system is inactive, the eyes closed. Most fish don't have eyelids (except for sharks). Also, a great many fish live nearly motionless lives. But most fish rest. Some float in place, some wedge themselves into a spot in the mud or the coral, some even build themselves a nest. They are still alert for danger, but they are also "sleeping."
Fish swim primarily by contracting bands of muscles in sequence on alternate sides of the body. This whips the tail very rapidly from side to side in a sculling motion. Vertical fins are used mainly for stabilization. Paired pectoral and pelvic fins are used primarily for stability when a fish hovers. Sometimes fish might use them to aid rapid forward motion.
Tunas and tuna-like fish, billfish, and certain sharks are the speed champions. They can reach 50 miles per hour in short bursts. Sustained swimming speeds generally range from about 5 to 10 miles per hour among strong swimmers.
Most fish swim in the horizontal position. The sea horse is among the exceptions. Another is the shrimp fish of the Indian Ocean, which congregates in schools of several individuals. It swims vertically, its long tube-like snout pointing directly upward. A catfish that lives in the Nile and other African rivers also swims in the vertical posture. Many kinds of midwater deepsea fish swim or rest vertically.
Fish vary greatly in size. The whale shark and basking shark exceed all other fish by a considerable margin in weight and length. Fish are a paraphyletic group that describes aquatic vertebrates while excluding tetrapods, and the bony fish that often represent the group are more closely related to cetaceans such as whales, than to the cartilaginous fish such as sharks and rays. [citation needed] As such, cross group comparisons on this page only serve a colloquial purpose.
The largest fish of the now-extinct class Placodermi was the giant predatory Dunkleosteus. The largest and most well known species was D. terrelli, which grew almost 9 m (29.5 ft) in length[24] and 4 t (4.4 short tons)[25] in weight. Its filter feeding relative, Titanichthys, may have rivaled it in size.[26] Titanichthys reached a length of 7 m (23 ft)[27][28] though in older paper it was estimated at 7.5 m (25 ft).[29]
The cartilaginous fish are not directly related to the "bony fish," but are sometimes lumped together for simplicity in description. The largest living cartilaginous fish, of the order Orectolobiformes, is the whale shark (Rhincodon typus), of the world's tropical oceans. It is also the largest living animal that is not a cetacean and, like the largest whales, it is a docile creature that filter-feeds on tiny plankton. An average adult of this species measures 9.7 m (32 ft) long and weighs an average of 9 tonnes. The largest verified specimen was caught in 1949 off Karachi, Pakistan and was 12.7 m (42 ft) long and weighed 21.5 tonnes. Although many are dubious, there are several reports of larger whale sharks, with reliable sources citing unverified specimens of up to 37 tonnes and 17 m (56 ft).[4][30]
The largest living bony fish (superclass Osteichthyes, which includes both ray-finned and lobe-finned fish) are the lesser known southern sunfish (Mola alexandrini) followed by widely distributed and better known ocean sunfish (Mola mola) and, both being members of the order Tetraodontiformes. The largest verified specimen belongs to the southern sunfish discovered dead near the Azores in the Atlantic has set the record for being the largest extant bony fish with the weight of 2,744 kg (6,049 lb). The record size ocean sunfish crashed into a boat off Bird Island, Australia in 1910 and measured 4.3 m (14 ft) from fin-to-fin, 3.1 m (10 ft) in length and weighed about 2,300 kg (5,100 lb),[4] while the other record for the biggest bony fish is yet held by a Mola alexandrini which was also coincidentally 2,300 kg in mass and 3.0 m in length, caught off in 1996 and misidentified as a Mola mola.[73][74]
Fish spawn in all ocean biome variants that can spawn in at the same rate. If you want salmon and cod specifically, you should avoid lukewarm and warm oceans to prevent pufferfish and tropical fish from spawning.
Introduction
Fishing effort in Florida has increased dramatically over the past decade and is forecast to continue as Florida's resident population of 14.7 million increases daily by about 1,000 people. More than 40 million tourists visit the state annually, most with coastal destinations. Fishing is a favorite pastime of Florida's residents and visitors, and in 1997, saltwater anglers made about 24 million fishing trips and caught 141 million marine fishes, 71.5 million of which were released. Because increased exploitation could negatively impact Florida fisheries, scientists and managers must remain diligent and innovative in their efforts to utilize fishery resources wisely and conservatively.
Managers of Florida's fisheries use a combination of traditional regulations to control harvests and protect fish stocks. These measures include bag limits, minimum and maximum sizes, closed seasons and areas, and in some cases, no harvest is allowed unless a special permit is purchased. Bag limits reduce the number of fish that are harvested and allocate the catch over time so that the year's total harvest is not taken in one season. Aggregate bag limits are sometimes applied collectively to a complex of species such as grunts and snappers, so that the community is not overfished. Minimum and maximum sizes, or "slot," limits protect sexually immature fish and may be imposed to create a "trophy" fishery, i.e., a fishery that produces extremely large individuals. Closed seasons and closed areas protect a species during spawning, especially when fish return yearly for spawning at known locations. The "no harvest" rule is implemented when a stock or species, for example, Goliath Grouper (jewfish), is severely overfished. To succeed, Florida's fisheries management strategies of size limits and closed seasons depend on the survival of fish that are caught and released. The fate of hook-and-line caught fishes that are released largely depends on the expertise and dexterity of the angler. Anglers practicing a few straightforward and intuitive techniques can increase survival of released fishes.
"Limit your kill; don't kill your limit!"
After being caught and released by an angler, fish may die for a variety of reasons. The most common causes of death are the physiological stresses caused by the struggle during capture and injuries caused by the hook or the angler. Some fish may die even though they appear unharmed and despite efforts at revival. Fish that struggle intensely for a long time during capture are usually exhausted and stressed from the accumulation of excessive amounts of lactic acid in their muscles and blood. Severe exhaustion causes physiological imbalance, muscle failure, or death. Therefore, use the proper weight-class tackle; land your catch quickly, and when possible, leave the fish in the water while you release it. Any exhausted animal needs oxygen to recover!
Hook wounds may appear minor to anglers, but damage to the gills, eyes, or internal organs can be fatal. If the fish is hooked deep in the throat or gut, research shows that it is best to cut the leader at the hook and leave the hook in the fish. Prolonged attempts to remove the hook often do more harm than good. In the Fish and Wildlife Research Institute's (FWRI)* study of release mortality in snook, 24 snook were deep hooked. We removed the hooks from 12 snook, and we left the hook intact and cut the leader in the other 12 snook. We found that four of the 12 deep-hooked snook died after the hooks were removed. None died when we simply cut the leader and left the hook alone. Fish are capable of rejecting, expelling, or encapsulating hooks. Encapsulation is a process whereby the fishes' healing process causes the hook to be covered with an inert matrix of calcified material; or a-cellular tissue. Steel and bronze hooks are less toxic and are rejected or "dissolved" sooner than are stainless steel and cadmium-plated or nickel-plated hooks.
Two types of hooks, barbless and circle hooks, are known to reduce injury and mortality of released fishes. Barbless hooks reduce tissue damage and handling stress because they can be removed quickly and easily. Barbless hooks are popular in the freshwater trout fisheries and are becoming increasingly popular with saltwater anglers. A Florida study conducted on snappers and groupers demonstrated that catch rates are the same for barbed and barbless hooks. If barbless hooks are not available, simply use pliers to crimp or remove the barbs from regular hooks. A caveat is called for when using these types of hooks: after having hooked your quarry, don't give the fish any slack, because it will be more likely to escape from barbless hooks than from regular hooks.
The use of circle hooks has been researched and compared to regular hooks-often called "J" hooks-in several fisheries. In all of them except in the flatfish, or flounder, fishery, circle hooks were shown to result in significantly lower hooking mortality and higher catch rates. In one study, tunas and billfishes were hooked in the jaw 90% of the time. Circle hooks reduced deep hooking fourfold in the striped bass fishery while "J" hooks were 21 times more likely to cause a bleeding injury. Circle hooks are a bit more tedious to use, especially with live bait, but the advantages should compel anglers to give them an honest trial. Overall, research shows that circle hooks improve catch rates and reduce hooking mortality which results in positive impacts on exploited fish stocks.
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