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Largehead hairtails are elongated in shape with a thin pointed tail (they lack a fish tail in the usual form). The eyes are large, and the large mouth contains long pointed fang-like teeth. [3] Largehead hairtails grow to 6 kg (13 lb) in weight, [4] and 2.34 m (7 ft 8 in) in length. [2]
Adult fish also prey on fish eggs and larvae. For example, haddock were observed satiating themselves with herring eggs back in 1922. [14] Another study found cod in a herring spawning area with 20,000 herring eggs in their stomachs, and concluded that they could prey on half of the total egg production. [17] Fish also cannibalise their own eggs.
Under normal conditions, the Pacific tenpounder are located in brackish water, but they travel deep into oceanic, salty waters for breeding. They place their eggs far from shore in more planktonic regions to provide them with nutrients as juveniles. [2] The larvae look like eels at birth, but their forked tails distinguish them.
Normally, a female lays eggs repeatedly at 6- to 9-day intervals about 10 times in a season. Eggs grow in the mussels' gills and juveniles stay inside the mussel about 15 to 30 days after fertilization. Eggs hatch after about three days when juveniles are about 2.8 mm long. The body has a unique shape resembling the bud of a matsutake mushroom ...
Marine fish can produce high numbers of eggs which are often released into the open water column. The eggs have an average diameter of 1 millimetre (0.039 in). The eggs are generally surrounded by the extraembryonic membranes but do not develop a shell, hard or soft, around these membranes. Some fish have thick, leathery coats, especially if ...
Yellow perch eggs are thought to contain a chemical in the jelly-like sheath that protects the eggs and makes them undesirable since they are rarely ever eaten by other fish. The eggs usually hatch in 8–10 days, but can take up to 21 days depending on temperature and proper spawning habitat.
The threadfin shad (Dorosoma petenense) is a small pelagic freshwater forage fish common in lakes, large streams and reservoirs of the Southeastern United States.Like the American gizzard shad, the threadfin shad has an elongated dorsal fin, but unlike the gizzard shad, its mouth is more terminal without a projecting upper jaw.
The fish has eight barbels around its mouth. [8] The barbels on the chin are black to yellowish brown. [9] Juvenile brown bullheads are similar in appearance, but are more likely to be of a single solid color. [5] The brown bullhead's mouth is terminal [5] [8] or slightly subterminal, [5] with the upper jaw projecting slightly past the lower ...