Nematocysts trigger and inject venom on contact, stinging, paralyzing, and killing molluscs and fishes. Large groups of Portuguese man o' war, sometimes over 1,000 individuals, may …

Feb 12, 2025 · The Portuguese man-of-war captures its prey by using its tentacles, or dactylozooids, which bear nematocysts, venom-filled stinging structures that paralyze small …

Jan 1, 1986 · Physalia physalis (Portuguese man-o'war) tentacles contain two types of nematocysts (LANE and DODGE, 1958), which have been separated on a small scale by …

The tentacles contain stinging nematocysts, microscopic capsules loaded with coiled, barbed tubes that deliver venom capable of paralyzing and killing small fish and crustaceans. While …

Oct 27, 2022 · It has numerous venomous microscopic nematocysts which deliver a painful sting powerful enough to kill fish, and has been known to occasionally kill humans. Although it …

Men-of-war have two different sizes of nematocysts (small and large) for stunning or killing prey (Kurlansky 2004). The fossil records for this species go back 600 million years (Parks 2000). …

The venom of the smaller nematocysts, which are present in greater abundance, was lethal in vitro to chick embryonic cardiocytes at doses of 0.6 microgram protein/culture, whereas 20 …

Aug 25, 2016 · The Portuguese man-of-war, Physalia physalis, is a marine animal that drifts on the ocean surface preying mostly on fish. Unlike many other marine animals, it has no head, …

Each Portuguese man o’war is a complex colony of eusocial animals. It consists of a colony of four kinds of highly adapted individual zooids, integrated so that they behave like a single …

Jan 1, 1986 · Isolation and partial characterization of a hemolytic and toxic protein from the nematocyst venom from the Portuguese man-o'war, Physalia physalis