31 facts about Arctic whales

This past week offshore drilling in the Arctic was approved to get underway (it’s been 20 years since this previously happened). This is going to severely affect the quiet and serene home for whales and other marine animals in the area. Here are 31 facts about the beluga, narwal, and bowheads whales – species that exclusively call this area home.


What’s the difference between a conch and a whelk?

Good rule of thumb would be that whelks are found in temperate water and conchs are found in more tropical waters. Also, conchs have eyeballs, while whelks have eyespots. If you’re lucky enough to catch them while feasting, whelks are carnivores and conchs are herbivores. Also, their body colors are different. Conchs tend to be green or gray while whelks are tan or whitish (but can be other colors).

Why are there holes through some clam shells?

moonsnailholezd2The shell to the right with a hole through it was hinged to another shell of equal size with an animal living inside (in this case, a clam). Animals with two shells hinged together are known as bivalves. Often, in restaurants oysters and clams are shucked and served “on-the-half-shell” (Yum! I prefer them plain, but sometimes mix it up with ones with plenty of horseradish!).

Animals in the ocean do not have the luxury of someone shucking their prey, but rather use an adaptation called a radula. A radula is the sharp, drill-like tongue of some mollusks (e.g., whelk or conch). Radulas are found on every class of mollusk except for bivalves. A whelk or a conch would use their radula to drill into the clam and then slurp out its meal … Leaving behind a perfectly symmetrical hole. Moon snails and oyster drills are also well-known for using this technique to drill into clams for a feast.

Image (c) imageshack.us