If you have men who will exclude any of God's creatures from the shelter of compassion and pity, you will have men who will deal likewise with their fellow men.
St. Francis of Assisi
Animals are our younger brothers and sisters, also on the ladder of evolution but a few rungs lower. It is an important part of our responsibilities to help them in their ascent, and not to retard their development by cruel exploitation of their helplessness.
Here I will focus my attention on fish and Crustaceans particularly lobsters as it is these creatures who are mostly exploited as food, other aquatic animals will be included in due course. However keep in mind in the catching of fish and lobsters many other aquatic animals suffer and die as a consequence.