Let
h be the second fundamental form of a compact submanifold
M of the quaternion projective space
HPn(1). For any unit vector
u∈
TM, set δ(
u)=||
h(
u,
u)||
2. We determine all compact totally complex submanifolds of
HPn(1) (resp. all compact totally real minimal submanifolds of
HPn(1)) satisfying condition δ(
u){≤}¼ (resp. δ(
u){≤}\frac{1}{12}) unit vectors
u∈
TM.
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