Dutch has a lot of good ones!

Hippo: Nile Horse (nijlpaard)

Leopard: Lazy Horse (luipaard)

Sea urchin: Sea Hedgehog (zee egel)

Seal: Sea Dog (zeehond)

Skunk: Stink Animal (stinkdier)

Turtle: Shield Toad (Schildpad)

Slug: Naked Snail (Naaktslak)

Porcupine: Spiky Pig (Stekelvarken)

Edit: formatting

And leopards