  We study the implications of the flavour SU(3) symmetry for various
interpretations of the neutron anomaly in the $\gamma N\to\eta N$ cross
section. We show that the explanation of the neutron anomaly due to
interference of known N(1535) and N(1650) resonances implies that N(1650)
resonance should have a huge coupling to $\phi$-meson -- at least 5 times
larger than the corresponding $\rho^0$ coupling. In terms of quark degrees of
freedom this means that the well-known N(1650) resonance must be a
"cryptoexotic pentaquark"-- its wave function should contain predominantly an
$s\bar s$ component.
  It turns out that the "conventional" interpretation of the neutron anomaly by
the interference of known resonances metamorphoses into unconventional physics
picture of N(1650).
