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Seahorses range in size from 1.5 to 35 cm (0.6 to 13.8 in). [13] They are named for their equine appearance, with bent necks and long snouted heads and a distinctive trunk and tail. Although they are bony fish, they do not have scales, but rather thin skin stretched over a series of bony plates, which are arranged in rings throughout their bodies.
The fins help guide and propel the seahorse. Lined seahorses are weak swimmers; they swim in an erect position. In comparison to their fins, the lined seahorse's body is too large, another reason why they are poor swimmers. They do not swim for long periods of time, nor do they travel far distances, unless they are migrating. [11]
Male seahorses have a specialized ventral brood pouch to carry the embryos, male sea dragons attach the eggs to their tails, and male pipefish may do either, depending on their species. [4] The most fundamental difference between the different lineages of the family Syngnathidae is the location of male brood pouch. [ 5 ]
Like other seahorses, the tiger tail seahorse has bony plates arranged in rings throughout its body, with this species in particular having 11 trunk rings and 33 to 37 tail rings. The dorsal fin has 17 to 19 rays, while the pectoral fin has 16 to 19 rays. Two spines extend from each cheek, in addition to a prominent spine on the nose.
They have a prominent spine above each eye. They have snouts that are short and upturned. [9] Their snouts are about 1/3 of the length of their head. [10] Their dorsal fin has 16–18 rays with a dark stripe that runs parallel to the margin and provides propulsion. Their pectoral fins have 13–15 rays and are located below the gill openings.
Like other seahorses, the dwarf seahorse has a head angled at right angles to its body and swims upright using its dorsal fin to propel it and its pectoral fins to steer. It grows to an average length of 2 and 2.5 cm (0.8 and 1.0 in), with a maximum length of 5.0 cm (2.0 in).
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The Japanese seahorse (in Japanese, kitano-umi-uma and sangotatsu) or lemur-tail seahorse (Hippocampus mohnikei) is a species of fish in the family Syngnathidae.The Japanese seahorse reaches a maximum length of 8.0 cm, is usually dark brown and has a relatively long tail, a ridgelike coronet and flattened spines.