Description:
Differs from all other species of Mystus
in having eyes lateral, rather than dorsolateral,
so that they are about equally visible viewed
either from above or from below head (in other species
eyes usually cannot be seen at all from directly below).
Mouth nearly terminal, less downturned than in any
other species of striped Mystus. Serrae of
pectoral spine smaller and less
erect than in any other striped Mystus.
Adipose fin short but very high, originating far
behind dorsal fin, its length about twice and its
height slightly less than eye diameter. Gill
rakers increase in number throughout life faster
than in any other Mystus. The anal fin has
slightly more rays (13-15) than other striped Mystus
of Thailand (usually 12 or less), and its posterior
border is distinctly falcate. Cranial fontanel extends
posteriorly to about midway between level of posterior
border of eye and base of supraoccipital process.
Maxillary barbel extends posteriorly to beyond anal
fin or to end of middle caudal fin rays. Habitat:
Often found in mixed schools with M.
multiradiatus which
congregate around tree limbs and other solid objects,
browsing the hard surfaces for zooplankton, aquatic
insects, crustaceans and rotifers. Moves into flooded
forests during the rainy season and returns to rivers
in November and December in the lower Mekong. Colouration:
Side of body with 3 faint dark and 2 whitish stripes.
Reproduction: Oviparous, distinct
pairing possibly like other members of the same family.
Etymology: The genus name Mystus:
"Mystax" meaning whiskered (hair on the
upper lip) Mystus was first used by Belon
in 1553 to describe all fish with whiskers. The specific
name mysticetus: generic name of baleen whales,
referring to numerous slender, baleen-like gill rakers.
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