All "Bloodyssal" monsters have Black fishscales, with some details in purple. They eyes are purple, and they teeth's are yellow. They have a giant body in relation to other marine beings, especially sharks, and in the case of "Bloodyssal Giant" monsters, larger than whales.
The entire archetype focus on quickly Link 2/Xyz Summoning and inflict damage (directly and/or effect). "Lanternfish", "Cookiecutter","Fangtooth" and "Sabertooth" can be Special Summoned from Hand for quickly Link Summon "Mermaid", and activate their effect to recover Fish-type monsters from GY, and then quickly Summon Rank 4 monsters. "Anglerfish" can decrease your opponent's monster ATK and inflict piercing damage, and "Viperfish" can Summon "Bloodyssal tokens" in your opponent's side: Those tokens have low ATK, and when are destroyed by Battle, your opponent takes 500 damage.