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Crucigrama Sopa de Letras Hoja de Trabajo
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Crustaceans and Aganathans

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Horizontales
Fish, shrimp and crabs are this type of crustacean characterized by having ten legs.
Hagfish have this in place of a boney spine. It allows them to be more flexible.
This is the accidental catching of animals when fishing with things like nets or traps.
Agnathan fish were the first of these.
The exoskeletons of crustaceans are made of this.
Agnathans are more eel like in appearance and do not have pairs of these.
These modern agnathan fish are parasites. They uses their suction cup like toothed mouth and tongue to latch on and drink the blood of a host animal.
These are very tiny crustaceans, about the size of a grain of sand. They also connect the bottom of the food chain to the top.
These are tiny and shrimp like. They live in huge swarms and connect the bottom of the food chain to the top by feeding on plankton and being eaten by whales etc.
Verticales
We first see these type of hard material in agnathans. We also see it in the human skeleton.
Fish of the class agnathan do not have this feature.
These crustaceans start their lives free swimming, but eventually attach themselves to a surface and use their legs to feed.
This softer material that we have in our nose and ears also first appeared in agnathans.
These modern agnathans are extra slimy. They are parasites and scavengers, feeding on dead and dying fish.
This type of decapod is likely to be free swimming while others dwell on the bottom.