The main device (symbol) in the Kot Morski blazon is the cat. The two main tinctures (colors) are gules and argent.
Gules, the heraldic colour red is very popular, sometimes said to represent “Military Fortitude and Magnanimity”1The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P36. It is usually abbreviated as gu and in the days before colour printing was shown in a system known as hatching by vertical lines 2Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P52. Although it may look like a French word it is normally pronounced with a hard “g” and may be derived either from the Latin gula (throat) or Arabic gule (rose).3A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1847, P154
Argent is the heraldic metal Silver and is usually shown as very pure white. It is also known more poetically as pearl, moon (or luna) 4Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P53. In a sketch or drawing it is represented by plain, unmarked paper 5A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1847, P11.
Cats occur often in heraldry, but the wild cat or cat-a-mountain is almost certainly intended rather than the domesticated felines we might at first come to mind! 6A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Cat It can appear in a variety of poses, similar to those of its larger relative, the lion, although we should be careful of stretching any meanings associated with the king of the beasts to their smaller brethren. Perhaps only an affinity with hills and the mountain country is intended.