Top Ad Slot
🤯 Did You Know (click to read)
Most modern shark species have two dorsal fins.
Sixgill sharks possess a single dorsal fin located far posterior on the body, a primitive anatomical trait distinguishing them from most modern sharks that have two dorsal fins.
Mid-Content Ad Slot
💥 Impact (click to read)
This configuration reflects their ancient lineage within the order Hexanchiformes and their adaptation to slow, energy-efficient cruising rather than high-speed pursuit.
Anatomical designs abandoned by faster surface predators persist in the abyss, where stability and endurance outweigh acceleration. Evolution in darkness follows different rules.
💬 Comments