Head on, they are just visible, thin though they are, but as soon as they turn, their mirrored sides reflect the remnants of blue light from the surface, and they disappear into the gloom.
Kuigi kõhnukesed, on nad otsevaates napilt nähtavad, kuid niipea, kui nad end pööravad, peegeldub nende külgedelt kogu veepinnalt siiajõudev valgus ning kalad kaovad pimedusse.