The channel catfish.
Some do, on the tail or dorsal fin.
black widows
A Brown and Black spooky spider!
inchworm... haha
Sounds like a Blue Heeler, possible Border Collie/Heeler mix.
That is the planet Jupiter. The black spot was created recently when a asteroid collided with it. Jupiter has a Great Red Spot created through storms. No planet has a black spot no mars has a giant red spot and mercury has the black spot
Probably ich (Ichthyophthirius multifilis). It's a parasite.
The Black Keys...."Lonely Boy"
black spot in the body
Black Widow spiders are native to tropical climates and are poisonous. They have a mostly black body with a large red spot.
a little spider black legs and yellow back with black spots
I think that fish would be a platy (pla-eye).