Did you know that there is a litte deep sea shark shaped like a tadpole (thus its German name) or a lollipop? It is the lollipop catshark.

Lollipop catshark
images of lollipop catsharks, Fig.1 from here, licensed under a Creative Commons Attribution License

Lollipop sharks live offshore Baja California and Gulf of California at depths of 155–937 m (509–3,074 ft). They are ovoviviparous (that means the eggs remain inside the female’s body until hatching), in this special case only one egg case in each uterus. The two pups measure up to 10 cm (3.9 in) each at birth, their mother is up to 28 cm (11 in) long.

In 2005, there was a change in the scientific classification of sharks. Due to DNA and morphological analysis, the former family catsharks was split in the families catsharks (Scyliorhinidae) and Pentanchidae. Since then, the lollipop catshark is, despite its name, no longer a species of the family catsharks but a Pentanchidae (like the shysharks, too, for instance). This fact is ignored by most webpages, even en.wikipedia.org, fishbase.org, elasmo-research.org or iucnredlist.org (but Eschmeyer’s Catalog of Fishes, basis for all classifications and linked on fishbase.org, and Germans wikipedia.de did publish it). That reminded me to keep treading warily with all information.

Sources: herehere and here