Monthly Archives: February 2019

Lt. Ellen Ripley’s least favorite fish.

Angelfish Mouth
Angelfish Mouth

Due to an extra joint in their jaw design, Angelfish can protrude their upper and lower jaw out away from their had and then bite really hard, something other fish can not do.

A big angelfish can extend its jaws a couple of inches. They can reach into nooks and crannies on the reef. They are powerful biters. They can yank.

Oh and yes, the title is an homage of the movie Alien

Nautical Mile Fact

Nautical Mile

A Nautical mile is based on the circumference of the earth, and is equal to one minute of latitude (1/60th of a degree). It is slightly more than a statute mile (1 nautical mile = 1.1508 statute miles.) Nautical miles are used for charting and navigating.

Side note:
Degrees of latitude are parallel so the distance between each degree remains almost constant but since degrees of longitude are farthest apart at the equator and converge at the poles, their distance varies greatly.

Each degree of latitude is approximately 69 miles (111 kilometers) apart. The range varies (due to the earth’s slightly ellipsoid shape) from 68.703 miles (110.567 km) at the equator to 69.407 (111.699 km) at the poles. This is convenient because each minute (1/60th of a degree) is approximately one nautical mile.

A degree of longitude is widest at the equator at 69.172 miles (111.321) and gradually shrinks to zero at the poles.

Creole Wrasse Fact: How that pot gets stirred.

Creole Wrasse Fact
Creole Wrasse

Creole wrasseClepticus parrae – are protogynous hermaphrodites; the largest fish in a group is a dominant breeding male, While smaller fish remain female. If the dominant male dies, the largest female changes sex.

Protogyny is the most common form of hermaphroditism in fish in nature. About 75% of the 500 known sequentially hermaphroditic fish species are protogynous.

Wrasses are always on the go during the day, but are the first to go to bed and the last to rise.

Clepticus: Greek, kleptikos = ‘related to thieves’