Konrad Wothe / Slow motion clip of Wood ants (Formica rufa) on anthill, squirting formic acid to repel threat, Bavaria, Germany, April.

Jeff Rotman / Giant Pacific octopus squirting ink at diver, British Columbia Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) squirting ink in defense as it jets away, Quadra Island, British Columbia, Canada

Nick Upton / Squirting cucumber (Ecballium elaterium) flowering in roadside scrubland bordering a coastal lagoon, with some fruits developing, near Nafplio, Argolis, Peloponnese, Greece, July.

Nick Upton / Squirting cucumber (Ecballium elaterium) flowering in roadside scrubland bordering a coastal lagoon, with some fruits developing, near Nafplio, Argolis, Peloponnese, Greece, July.

Kim Taylor / Wood ants (Formica rufa) jetting formic acid to protect their nest. Surrey, England, June. Digital Composite.

Kim Taylor / Wood ants (Formica rufa) jetting formic acid at a human hand, Surrey, England, June.

Kim Taylor / Wood ants (Formica rufa) jetting formic acid at a human hand, Surrey, England, June.

Lisa Hoffner / Female elephant (Loxodonta africana) squirting water at a Olive baboon (Papio anubis) waiting its turn to drink at a water hole dug by the elephant in the dry Ewaso Nyiro riverbed. Taken during the wo...

Kim Taylor / Wood ants (Formica rufa) jetting formic acid to protect their nest. Surrey, England, June. Digital Composite.

Chien Lee / Termite (Hospitalitermes sp) soldiers defending a column of workers with chemical weaponry, each is capable of squirting a noxious fluid from the gland on its head, Tibu, Batang Ai National Park, Mala...

Alex Mustard / Warty frogfish (Antennarius maculatus) swimming over the seabed, by gulping in water, then closing its mouth and squirting the water out of vents by its pelvic fins. Anilao, Batangas, Luzon, Philippin...