"Names for tank traps?" Topic

Do those six-pointed tank obstacles have names? I thought they were Spanish hedgehogs but someone else told me those are a type of barbed wire construction.

Whilst I'm at it, what do you call the anti-landing-craft obstacles that are like the above but with one long 'leg' so that a boat gets itself impaled on a pointy telegraph pole?

The anti-landcraft ones I've heard referred to as "asparagus". I think the idea is that they had mines on the end, but the seawater rusted the mines to uselessness.

I've also seen them as Czech hedgehogs, Barks1. I don't know of a name for the other ones.

Somehwat unrelatedly, Rommel's asparagus was a term for a construction build in the French fields to deter gliders from landing there.

It consisted of wooden poles struck into the ground, with explosives on their top and wires running in between – the ideas was that a glider landing on the field would touch the wires and cause the explosives to go off, with uncomfortable results to the passengers of the said glider.

Griefbringer

Dragon's Teeth = concrete obelisks
Belgian Gates = some sort of steel bar grate/structure

I've also seen a reference to the long-pole-with-a-mine beach defences as 'Rommel's XXXX' – can't remember the second word.

I think you'll have to web search for D-Day + defences.

I dont know if the english name is spanish hedgehogs, but in dutch it is quite similar "spaanse ruiters" or freely translated "spanish riders".

I've heard the term tetrahedron for the constructions of three steel beams welded at right angles.

Checking D-Day sites I see (on a map of Omaha Beach defenses):
Hedgehogs
Tetrahedra
Element "C"
Log ramps
Curved rails
Stakes