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Young grunion grow rapidly and are about five inches long by the time they reach one year old and are ready to spawn. Adult fish normally range in size from 6 to 7 in (15 to 18 cm) with a maximum recorded size of 8.5 in (220 mm) (San Diego, CA., 05-11-05).
Leuresthes tenuis, the California grunion, is a species of ray-finned fish native to the Pacific coast of North America from Monterey Bay in California to Baja California.This species grows to 19 cm (7 in) in total length and is of minor importance to local fisheries, particularly during grunion runs in which the fish beach themselves to lay their eggs and are easily taken.
At the time of the smelt's spring run in the Neva River at the head of the Gulf of Finland on the Baltic Sea in Saint Petersburg, a Smelt Festival (Prazdnik koryushki) is celebrated. The Magic Smelt Puppet Troupe of Duluth, Minnesota has held an annual "Run, Smelt, Run!" puppet-based second line parade, smelt fry, and dance party since 2012. [14]
Night smelt spawn along sandy open coasts and coarse sandy beaches often in proximity to river or creek mouths in north-central to northern California. [3] [1] However, little is known about the movement of night smelt in California. [1] They spawn nocturnally in courser sand grain sizes and spawning generally occurs from January to September. [4]
Leuresthes sardina, commonly known as Gulf grunion, is a species of grunion endemic to the Gulf of California. [2] [3] It is classified as Near Threatened by the IUCN ...
Spawning triggers are environmental cues that cause marine animals to breed. Most commonly they involve sudden changes in the environment, such as changes in ...
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The time to sexual maturity is dependent on food supply and water temperature and abundant food and warmer temperatures encourage faster growth. [6] Crossman and Scott state that in optimal conditions and large lakes, rainbow smelt may reach 35.6 centimetres (14.0 in) and can live for over seven years.