UnScramble this Word: n s b e a c s e?

Questions

The bottle-nosed ---------- can dive to a depth of 3,000 feet in two minutes.?

---------- are voluntary breathers. For this reason, they sleep with only half of their brain at one time. The other half remains alert to regulate breathing. Resident whales typically remain near the surface, breathing and swimming in a pattern. When traveling together, resident pods have been observed to breathe in unison. Although it is not known why this occurs, it could be a way of helping the pod keep tabs on one another.?

In Alaska, it is legal to shoot ----------. However, waking a sleeping bear for the purpose of taking a photograph is prohibited.?

Clams have a row of ---------- around their shells.?

Out of the 650 known species of leeches, Hirudo medicinalis is the most common used by ----------?