(CNN) -- A flat-faced frog fish, bug-eating slug and carnivorous sea sponge are some of the top new species named by scientists.
They appear on a "top 10" list of new species released Saturday amid warnings from the United Nations that the world is not doing enough to protect vulnerable eco-systems.
"Biodiversity loss is moving ecological systems ever closer to tipping point beyond which they will no longer be able to fulfill their vital functions," said Secretary-General Ban Ki-moon on the International Day for Biological Diversity, which is being marked in 11 countries.
More coverage: Environment
A report released in late April by researchers from the United Nations Environment Program showed that world leaders had failed on a 2002 commitment to reduce the global rate of biodiversity loss by 2010.