Family beaks (Ziphiidae)
Medium and large toothed whales with a body length of up to 6-12.5 m. The muzzle forms a narrowed “beak”. The fat pad forms a convex forehead. The semilunar shape of the breath was located bulging back and forth. The dorsal fin is at the level of the anus or slightly in front of it. The tail blades do not have a notch between them. The pectoral fins are located low on the sides of the body. The dorsal fin is shifted to the rear half of the body. On the throat pass 2-4 grooves diverging at the rear ends.
In the skull, a long and narrow rostrum is longer than the brain box. The maxillary, intermaxillary and frontal bones form ridges. Stony bones fuse with the skull. Large lacrimal bones do not merge with zygomatic. Large pterygoid bones are separated from each other at a small distance. The lower jaw is wider than the upper and protrudes slightly in front of it.
Dental formula: 0-19 / 1-26. The surface of the mouth is rough.
Numerous teeth are laid in the embryos, later reducing. The teeth of females are smaller than males, often do not cut at all.
In adults, most members of the family have few teeth only on the lower jaw.
The number of vertebrae does not exceed 50. The ribs are no more than 10 pairs, their thoracic sections do not ossify. In adults, the rudiments of the olfactory nerves are preserved.
Distributed in warm, temperate and cold waters of all oceans. Teutophagi feed mainly on cephalopods. Capable of deep and prolonged (up to 90 minutes) diving.
There are 5 genera in the family.
All information is taken from books and the web.