Editing Bullhead shark (section)

==Description==
Bullhead sharks have tapered bodies, with most species reaching around {{Convert|70-130|cm|ft}} in length. Their bodies vary in colour, including shades of grey, brown, and red and pale colours, and are covered in a variety of patterns, including spots and stripes.<ref name=":2">{{Cite book |last=Carvalho |first=Marcelo |url= |title=Grzimek's Animal Life Encyclopedia |date=2002 |chapter=Heterodontiformes (Bullhead or Horn Sharks) |chapter-url=https://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/heterodontiformes-bullhead-or-horn-sharks |via=Encyclopedia.com}}</ref> They have blunt, proportionally large heads with relatively small mouths and large nostrils, with pronounced ridges above their eyes. They have two dorsal fins, both substantial in size, the first larger than the second, each of which has a rigid fin spine at the front, along with an anal fin.<ref>{{Cite journal |last1=White |first1=William T. |last2=Mollen |first2=Frederik H. |last3=O’Neill |first3=Helen L. |last4=Yang |first4=Lei |last5=Naylor |first5=Gavin J. P. |date=2023-07-12 |title=Species in Disguise: A New Species of Hornshark from Northern Australia (Heterodontiformes: Heterodontidae) |journal=Diversity |language=en |volume=15 |issue=7 |pages=849 |doi=10.3390/d15070849 |doi-access=free |issn=1424-2818}}</ref><ref name=":2" /> The tail fin is also large, with upper and lower lobes separated by a notch.<ref name=":2" /> Bullhead sharks have differentiated teeth, with cusped grasping teeth at the front of the mouth, and flattened teeth at the back of the mouth.<ref name=":1" /> Their [[Egg case (Chondrichthyes)|egg cases]] have a spiral colarettes running along their length.<ref>{{Cite journal |last1=Fischer |first1=Jan |last2=Licht |first2=Martin |last3=Kriwet |first3=Jürgen |last4=Schneider |first4=Jörg W. |last5=Buchwitz |first5=Michael |last6=Bartsch |first6=Peter |date=2014-04-03 |title=Egg capsule morphology provides new information about the interrelationships of chondrichthyan fishes |url=http://www.tandfonline.com/doi/abs/10.1080/14772019.2012.762061 |journal=Journal of Systematic Palaeontology |language=en |volume=12 |issue=3 |pages=389–399 |doi=10.1080/14772019.2012.762061 |bibcode=2014JSPal..12..389F |issn=1477-2019}}</ref>