The catshark is the largest family of sharks with around 160 species in 17 genera. Just to confuse you further, catsharks are also known as dogfish. The main difference being that catsharks are oviparous (lay eggs) while
The common octopus is not only among the most studied of all octopuses, but among the most intelligent of them all. These octopuses hail from the eastern Atlantic, extending from the Mediterranean Sea, the southern coast of
The pygmy killer whale isn’t actually a whale at all, but a species of dolphin, like other killer whales (orca). These critters are the smallest cetacean species with the word “whale” in its common name. Even though they face
The dwarf sperm whale can be found throughout all of the world’s oceans, preferring deeper tropical and temperate waters. These critters are related to the pygmy sperm whale. Even though these diminutive whales are subjected to
The butterflyfish is so named for their resemblance to butterflies in their flattened appearance and in how they almost flutter when they swim. There are over 120 identified species of these beautiful fish found in both
The yellowfin tuna, aka ahi (although that is more related to the bigeye tuna) or albacore (which is a misnaming as albacore are a separate species altogether) are epipelagic (part of the oceanic zone into which enough light
The bigeye tuna is a true tuna that belongs in the mackerel family. There are 2 species, known as ahi. The other is the yellow fin tuna. They are found in all temperate and tropical oceans, sans the Mediterranean Sea. Due to
The spotted seahorse, aka common seahorse, yellow seahorse, or estuary seahorse, mostly inhabits the waters off the coasts of the China down to Australia. However, they can also be found in the Persian Gulf over to
The sea pen, aka sea pansies, are a cosmopolitan species that can be found in oceans all over the world. These peculiar creatures spend their lives partially dug into the substrate with their feather-like proboscis sticking
Copepods are a group of small crustaceans found in practically every freshwater and saltwater habitat in the world, including Antarctica. Some species are planktonic, while others are benthic (live on the ocean
