I like it. Not many fish will actively bite at something like that. That fish may be over 100 years old too, lots of deepwater fish live a long time. Orange Roughy don't even hit sexual maturity for like 50+ years, Greenland Sharks are estimated to hit sexual maturity around 150 years.
Whatever it is, it's highly efficient. Large head to ensure it can swallow large prey, long jagged teeth are meant to keep something like a wriggling fish from escaping, body of an eel for easier movement, no eyes because it's evil. If he was mine his only name could be Captain Wiggles.