remove implication man_o'_war_(medusozoa) (16) -> medusozoan (1211)
create implication hydrozoan (28) -> medusozoan (1211)
create implication hydra_(genus) (1) -> hydrozoan (28)
create implication man_o'_war_(medusozoa) (16) -> hydrozoan (28)
create implication siphonophore (14) -> hydrozoan (28)