Subocular line - A line beneath or below the level of the eye.
Tarsal - The last segments of the leg. Often divided into two to five tarsal segments.
Terga - The upper or dorsal surface of any body segment.
Compound and binocular microscopes are available in a wide range of optical quality, and needless to say, with increasing optical quality come increasing prices! What do you need?
In examining fish, whether dead or dying, an external examination with a binocular dissecting scope of eyes, skin, and fins should be done first (before external parasites fall off or are otherwise dislodged); ...
Shortsighted compared to terrestrial creatures, most fish have monocular vision. This means that each eye can focus on an object independently of the other eye, affording them an all-around panoramic field of vision.
Beryciformes: Orbitosphenoid present; two supramaxillae in Berycidae and Holocentridae; subocular shelf present (may be reduced); pelvic fins usually with more than five soft rays; 16 or 17 branched caudal fin rays (or 18 or 19 principal rays); ...
Cichlid: A family of perchlike freshwater fish characterized by a laterally flattened body, with spines in the dorsal and anal fins, have only a single nostril on each side, have a divided lateral line, and lack a subocular shelf.
Underside and back are slightly convex. Small outward facing mouth with 3 pairs of barbels. Although a Botia, sids do have small scales which are not present on the head. Subocular spines are present. Can reach 5 inches (30cm) in length.
Coloration: ...
On the contrary, when under MS222 anaesthetic sedation and observed under a binocular microscope, it becomes evident that the dye is not painted on the surface of the fish, but has been injected under the epidermis.
your loaches, always ask the store to double or even triple bag the fish, as all Botiine loaches have suborbital spines that will protrude when scared or stressed - it's a defense mechanism. Nobody wants a popped bag on the way home from an ocular ...
Also, Clown Loaches have a sub-ocular spine the protrudes from beneath the eye, therefore when using a net to catch a Clown Loach, you should be careful not to allow this spine to caught on the net.
 See also: Fish, Aquarium, Water, Species, Plants
  
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