Sea Mouse (Callionymus Pusillus)

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Sea Mouse (Callionymus Pusillus)
Sea Mouse (Callionymus Pusillus)

Video: Sea Mouse (Callionymus Pusillus)

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Video: Sea Mouse - Rutherfords [Official Video] 2023, February
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The sea mouse, or gudgeon (Sailfin dragonet) keeps on sandy grounds, sometimes at the very edge of the water; scared, quickly disappears, digging into the sand. It feeds on small benthic invertebrates, mainly worms and crustaceans. Body length 10-14 cm. Body brown dorsally, with small blackish dots and lines. Breeds from May to August, males guard the territory; eggs and larvae are pelagic.

Sea mouse (Callionymus pusillus), photo photography sea fish
Sea mouse (Callionymus pusillus), photo photography sea fish

Appearance

The body is low, elongated; lateral line in the upper body; the head is large, lipped, with a long snout, the length of which exceeds the diameter of the eye; gill openings are small. A spine of the preopercular bone with three, occasionally four teeth, two of which are directed upwards. The snout is elongated, its length in adults exceeds the diameter of the eye, it is 31.7-38.7% of the length of the head, the diameter of the eye is 22.3-28.1% of the same length.

The rays of the spiny dorsal fin in females more often reach or less often do not reach the beginning of the base of the soft dorsal fin, the 1st ray is 1.5-2 times shorter than the length of the head, in males they extend beyond the beginning of the soft dorsal fin, slightly shorter or equal to the length of the head, 1 The th ray is contained in it 1-1.2 times. The rays of the soft dorsal fin in female gudgeon do not reach the beginning of the caudal, 1st ray and usually the latter is always shorter than the length of the fin base; in males they extend beyond the beginning of the caudal, sometimes extending beyond its middle, 1st ray 1.9-4.5, the latter 1–1.6 times longer than the base.

Lyre sea mouse (Callionymus lyra)
Lyre sea mouse (Callionymus lyra)

Related article Sea mouse lyra (Callionymus lyra)

The caudal fin in females is somewhat shorter or less often longer than the length of the head, in males it is 1.6-2.7 times greater than it. The anal papilla in males is highly developed, in females it is rudimentary.

Sea mouse (Callionymus pusillus), photo photograph sea fish
Sea mouse (Callionymus pusillus), photo photograph sea fish

Color

Coloring varies. The body is brownish dorsally, with small blackish dots and lines, below which are larger whitish dots with a black border around. Males have up to 14-15 and lighter stripes on the sides with a black border, vague below, as well as longer parallel transverse stripes on both dorsal fins and spots on the pelvic fins; anal fin with black, diffuse border along apex. In females, stripes on the sides and both dorsal fins are absent, the first dorsal is almost black, the spots on the pelvic fins are dark.

Dimensions

The body length of males is up to 14, of females - up to 10 cm.

Spread

Mediterranean Sea and the Iberian coast adjacent to the west of Gibraltar, in the eastern part of the sea off the coast of Palestine. Sea of ​​Marmara. The Black Sea off the coast of Crimea (Sevastopol, Balaklava, Karadag, Feodosia), the Caucasus (Anapa, Novorossiyskaya Bay, Novy Afon, Gelendzhik, Batumi), Bulgaria and Romania (Mangalia, Adjidzha), the southern part of the Kerch Strait.

Sea mouse (Callionymus pusillus), photo photograph of fish
Sea mouse (Callionymus pusillus), photo photograph of fish

Biology

The biology of sea mice is poorly understood. It prefers to swim on sandy soils, sometimes at the very edge of the water; scared, quickly disappears, digging into the sand. It also occurs at great depths, 30-35 m.

Nutrition

It feeds on small benthic invertebrates, mainly worms and crustaceans.

Breeds from May to August, males guard the territory; eggs and larvae are pelagic. Off the coast of Bulgaria, eggs were found in June-August at a water temperature of 16-25 ° C, together with larvae were caught at a distance of up to 5 miles from the coast, single eggs were caught at a distance of 7-10 miles. In Novorossiysk Bay, 2 fry 6 mm long were caught in late July and early August.

Economic value

The sea mouse has no economic value.

Literature:

1. N. Svetovidov. Fish of the Black Sea. Moscow-Leningrad, 1965

2. Vasilyeva E. D. Fish of the Black Sea. Keys to marine, brackish, euryhaline and anadromous species with color illustrations collected by S.V. Bogorodsky. - M.: Publishing house VNIRO, 2007

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