cyrogeist said:
did you know the word tank was just the british pulling a word out of there ass! they used it so the german had no clue what they were talking about!
Sounds suspect to me, there are other uses of tank like water tank, cooling tank.
From http://dictionary.reference.com/browse/tank
"Origin:
1610?20; perh. jointly < Gujarati tānkh reservoir, lake, and Pg tanque, contr. of estanque pond, lit., something dammed up, deriv. of estancar (< VL *stanticāre ) to dam up, weaken; adopted as a cover name for the military vehicle during the early stages of its manufacture in England (December, 1915)"
When angler fish reproduce the comparatively tiny males permanently attach themselves to the female.