Name The Year: Soviet Lunik 2 becomes first human-made object to crash on moon.?

Questions

The crayfish isn't a fish at all - it is related to the ----------?

---------- gather in groups to sleep through the winter. Sometimes up to 1,000 of them will coil up together to keep warm.?

There are about 130 species of ----------?

The maximum life span of ---------- has been documented to be over 200 years in exceptional cases. The average life span of the large colorful fish, however, is 25 to 35 years.?

The ---------- continually grows new sets of teeth to replace old teeth. It also cannot move its tongue. The tongue is rooted to the base of its mouth.?