hi odyssey
great!!! very interesting video. in the second part the species looks much like puliensis - which it is certainly not. but the close relationship is visible here by the pattern-resemblance too. as it's hard to have pictures of wui's it's high time for some more videos (apart of my marginal, short ones on youtube).
onother thing much more important and valid for all "suckers" is visible here: they don't suck with special formed fins. all "suckers" get hold on the substratum with the structures (J. Freyhof calls them "gecko-like") on the brim of the pectoral- and ventral-fins. I've been arguing about this fundamental error with some ichthyologists for a long time. in lack of better knowledge, experts copied the error the last 150 years. reminds me my studies in history with incredible naive - or interst-linked - repetitions of the same "facts", written in stone.
as a worker of stone I can state this: "suckers" can perform a suction effect on plain glass with the
body
spotted sucking on glass with the body
they can
cling to glas with the fin structures (youngsters without a completly formed "suckingg"-body do so too)
sinogastromyzon wuis on the frontglass, one gliding over the other in the ouput section of a 1200 lt-eheim power-head
viriosus with contrast colours. the contact-area marking violet. once without "help" of fins, once with the hole program.
but they could never do this on a natural. not perfectly sanded stone.
cheers charles
