skates
Salmon
One fish I could think of is the Parrot fish.
You get fish letters from pressing (on a computer not a laptop) alt 4 2 6 one after another.
A large antelopes which have six letters are impala and koodoo (kudu).
About 6 inches.
Guitar
Guitar.
you have spaces for seven letters
Marlin
Deigns
Desert 6 letters