Erased Similar to couped, but the neck ends in a ragged edge. Animal and Beast positioning is broken into three categories Sea, Land, and Air. Each of these areas covers the basic poses that are used in heraldry. It is in no way a complete list of components. Categories not included are insects,reptiles,and amphibians with all have poses that are unique to them.
Fish are fairly simple to blazon.
There are only four basic postures for a fish. Normally we think of a porpoise as a dolphin. Hauriant positioned vertically with heads rising upwards -a common posture. Urinant positioned vertically with heads sinking downwards -a rare posture. Naiant swimming fesswise -a common posture.