  The baryon-antibaryon spectrum consisting of strange, charm and bottom quarks
is studied in the color flux-tube model with a multi-body confinement
interaction. Numerical results indicate that many low-spin baryon-antibaryon
states can form compact hexaquark states and are stable against the decay into
a baryon and an antibaryon. The multi-body confinement interaction as a binding
mechanism plays an important role in the formation of the states. They can be
searched in the $e^+e^-$ annihilation and charmonium or bottomonium decay if
they really exist. The newly reported states, X(1835), X(2370), Y(2175),
Y(4360) and Y_b(10890), may be interpreted as $N\bar{N}$, $\Delta\bar{\Delta}$,
$\Lambda\bar{\Lambda}$, $\Lambda_c\bar{\Lambda}_c$ and
$\Lambda_b\bar{\Lambda}_b$ states, respectively.
