Sp9999
Voyage
Ferro-cement
No
Pink
Madrid, Spain
45 ft
120 ft
25 kg
23 ft
Another defining feature of sharks is their array of gill slits. Unlike bony fishes, which have one gill slit on each side of their bodies, most sharks have five slits on both sides that open individually (and some shark species have six or seven). After water flows into a shark mouth as it swims, it closes its mouth, forcing the water over its internal gills.