A report published on Wednesday by a consortium showed that some Dutch banks are still investing in arms companies despite some progress in the last two years.
As crowds gathered outside Dutch bank ING's headquarters in Amsterdam - they looked more like children's entertainers than angry protestors.
But lions costumes are the trademark of Dutch bank ING. The lions are angry over a report that says ING are investing in companies that make nuclear weapons.
Carrying a plastic rocket with the words "DISARMAMENT" written in Dutch.
They're calling for all Dutch banks to stop investing in such companies.
Two years ago Oxfam published a report questioning whether banks should be allowed to invest in defence companies.
"Our report actually investigates what is the policy and practice of the investing by the different Dutch banks in the weapon industry and unfortunately we found out that ING bank is one of the banks which actually still is investing in production of nuclear weapons and cluster ammunition," says Farah Karimi, Oxfam Novib director.
ING say they agree with the groups aims but the report is flawed.
But it might take a few more lions and maybe a couple of tigers to get the big cats to take notice.