Although slow-moving, the ants are highly aggressive in defending their territory.
Synovial sarcomas are highly aggressive soft tissue malignant tumors that occur primarily in young adults.
Also, within their natural social groups, adult females are highly aggressive and totally dominate adult males during social interactions.
There are some tumors, though small when discovered, that are highly aggressive and may spread despite early discovery.
Hockel, M., Schlenger, K., Hockel, S. & Vaupel, P. Hypoxic cervical cancers with low apoptotic index are highly aggressive.
Gobies are highly aggressive when defending their nest and have been known to kill and eat other fish when doing so.
They are highly aggressive, or at least they were toward the small bits of frozen liver that I fed them and the axolotls.
Chicks of this species are highly aggressive toward conspecifics, but never to peers that hatched from the same clutch (modal clutch size is three).
Children who are highly aggressive by age seven or eight tend to remain so later in life; these children are three times more likely to have police records as adults than are other children.
"It's possible that they're incredibly friendly and everybody loves them and they were never mean, but I'm not so convinced by that, because there are so many kids right behind them in the hierarchy who are highly aggressive".
Malignant glioblastomas are highly aggressive tumors virtually resistant to available treatments and predominantly leading to death.
